refactor(docs): restructure min requirements section

The ordering of the setup guide is quite confusing, primarly because the
min requirements section is overly verbose. Reconcile this information
into a single table, and present the most important information at the
start of the document i.e. how to get the source, and the tools to
compile.

Change-Id: I1c4d708259e152b101c7282dad19e467d6c36519
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/docs/getting_started/prerequisites.rst b/docs/getting_started/prerequisites.rst
index 3498ac5..0d4331f 100644
--- a/docs/getting_started/prerequisites.rst
+++ b/docs/getting_started/prerequisites.rst
@@ -8,32 +8,53 @@
 different from those listed below, however only the software described in this
 document can be officially supported.
 
-Build Host
-----------
+Getting the TF-A Source
+-----------------------
 
-|TF-A| can be compiled on both Linux and Windows-based machines.
-However, we strongly recommend using a UNIX-compatible build environment.
+Source code for |TF-A| is maintained in a Git repository hosted on
+`TrustedFirmware.org`_. To clone this repository from the server, run the following
+in your shell:
 
-Testing is performed using Ubuntu 22.04 LTS (64-bit), but other distributions
-should also work, provided the necessary tools and libraries are installed.
+.. code:: shell
+
+    git clone "https://review.trustedfirmware.org/TF-A/trusted-firmware-a"
 
-.. _prerequisites_toolchain:
 
-Toolchain
----------
+Requirements
+------------
 
-|TF-A| can be built with any of the following *cross-compiler* toolchains that
-target the Armv7-A or Armv8-A architectures:
+======================== =====================
+        Program          Min supported version
+======================== =====================
+Arm Compiler             6.18
+Arm GNU Compiler         13.2
+Clang/LLVM               11.0.0
+Device Tree Compiler     1.4.7
+GNU make                 3.81
+mbed TLS\ [#f1]_         3.4.1
+Node.js [#f2]_           16
+OpenSSL                  1.0.0
+Poetry [#f2]_            1.3.2
+QCBOR\ [#f3]_            1.2
+Sphinx\ [#f2]_           2.4.4
+======================== =====================
 
-- TF-A has been tested with version 13.2.Rel1 (gcc 13.2) from the `Arm Developer website`_
+.. [#f1] Required for Trusted Board Boot and Measured Boot.
+.. [#f2] Required only for building TF-A documentation.
+.. [#f3] Required only when enabling DICE Protection Environment support.
 
-   You will need the targets ``arm-none-eabi`` and ``aarch64-none-elf`` for
-   AArch32 and AArch64 builds respectively.
+Toolchain
+^^^^^^^^^
 
-- Clang == 14.0.0
-- Arm Compiler == 6.18
+|TF-A| can be compiled using any cross-compiler toolchain specified in the
+preceding table that target Armv7-A or Armv8-A. For AArch32 and
+AArch64 builds, the respective targets required are ``arm-none-eabi`` and
+``aarch64-none-elf``.
 
-In addition, a native compiler is required to build the supporting tools.
+Testing has been performed with version 13.2.Rel1 (gcc 13.2) of the Arm
+GNU compiler, which can be installed from the `Arm Developer website`_.
+
+In addition, a native compiler is required to build supporting tools.
 
 .. note::
    Versions greater than the ones specified are likely but not guaranteed to
@@ -45,74 +66,63 @@
    For instructions on how to select the cross compiler refer to
    :ref:`Performing an Initial Build`.
 
-.. _prerequisites_software_and_libraries:
-
-Software and Libraries
-----------------------
-
-The following tools are required to obtain and build |TF-A|:
-
-- An appropriate toolchain (see :ref:`prerequisites_toolchain`)
-- GNU Make
-- Git
-
-The following libraries must be available to build one or more components or
-supporting tools:
-
-- OpenSSL >= 1.0.0 (1.0.x, v3.0.0 to v3.0.6 highly discouraged due to security issues)
+OpenSSL
+^^^^^^^
 
-   Required to build the cert_create, encrypt_fw, and fiptool tools.
+OpenSSL is required to build the cert_create, encrypt_fw, and fiptool tools.
 
-   .. note::
+If using OpenSSL 3, older Linux versions may require it to be built from
+source code, as it may not be available in the default package repositories.
+Please refer to the OpenSSL project documentation for more information.
 
-    If using OpenSSL 3, older Linux versions may require it to be built from
-    source code, as it may not be available in the default package repositories.
-    Please refer to the OpenSSL project documentation for more information.
+.. warning::
+    Versions 1.0.x and from v3.0.0 up to v3.0.6 are strongly advised against due
+    to concerns regarding security vulnerabilities!
 
-The following libraries are required for Trusted Board Boot and Measured Boot
-support:
+Device Tree Compiler (DTC)
+^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-- mbed TLS == 3.4.1 (tag: ``mbedtls-3.4.1``)
+Needed if you want to rebuild the provided Flattened Device Tree (FDT)
+source files (``.dts`` files). DTC is available for Linux through the package
+repositories of most distributions.
 
-The following libraries are required for DICE Protection Environment support:
+Arm Development Studio (`Arm-DS`_)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-- QCBOR == 1.2 (tag: ``v1.2``)
+The standard software package used for debugging software on Arm development
+platforms and |FVP| models.
 
-These tools are optional:
+Node.js
+^^^^^^^
 
-- Device Tree Compiler (DTC) >= 1.4.7
+Highly recommended, and necessary in order to install and use the packaged
+Git hooks and helper tools. Without these tools you will need to rely on the
+CI for feedback on commit message conformance.
 
-   Needed if you want to rebuild the provided Flattened Device Tree (FDT)
-   source files (``.dts`` files). DTC is available for Linux through the package
-   repositories of most distributions.
+Poetry
+^^^^^^
 
-- Arm `Development Studio (Arm-DS)`_
+Required for managing Python dependencies, this will allow you to reliably
+reproduce a Python environment to build documentation and run analysis tools.
+Most importantly, it ensures your system environment will not be affected by
+dependencies in the Python scripts.
 
-   The standard software package used for debugging software on Arm development
-   platforms and |FVP| models.
-
-- Node.js >= 16
-
-   Highly recommended, and necessary in order to install and use the packaged
-   Git hooks and helper tools. Without these tools you will need to rely on the
-   CI for feedback on commit message conformance.
+.. _prerequisites_software_and_libraries:
 
-- Poetry >= 1.3.2
+Package Installation (Linux)
+----------------------------
 
-   Required for managing Python dependencies, this will allow you to reliably
-   reproduce a Python environment to build documentation and run analysis tools.
-   Most importantly, it ensures your system environment will not be affected by
-   dependencies in the Python scripts.
+|TF-A| can be compiled on both Linux and Windows-based machines.
+However, we strongly recommend using a UNIX-compatible build environment.
 
-Package Installation (Linux)
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Testing is performed using Ubuntu 22.04 LTS (64-bit), but other distributions
+should also work, provided the necessary tools and libraries are installed.
 
-If you are using the recommended Ubuntu distribution then you can install the
-required packages with the following command:
+The following are steps to install the required packages:
 
 .. code:: shell
 
-    sudo apt install build-essential git
+    sudo apt install build-essential
 
 The optional packages can be installed using:
 
@@ -141,17 +151,6 @@
 
 .. _prerequisites_get_source:
 
-Getting the TF-A Source
------------------------
-
-Source code for |TF-A| is maintained in a Git repository hosted on
-TrustedFirmware.org. To clone this repository from the server, run the following
-in your shell:
-
-.. code:: shell
-
-    git clone "https://review.trustedfirmware.org/TF-A/trusted-firmware-a"
-
 Additional Steps for Contributors
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -189,5 +188,6 @@
 .. _Gerrit Code Review: https://www.gerritcodereview.com/
 .. _Linaro Release Notes: https://community.arm.com/dev-platforms/w/docs/226/old-release-notes
 .. _Linaro instructions: https://community.arm.com/dev-platforms/w/docs/304/arm-reference-platforms-deliverables
-.. _Development Studio (Arm-DS): https://developer.arm.com/Tools%20and%20Software/Arm%20Development%20Studio
+.. _Arm-DS: https://developer.arm.com/Tools%20and%20Software/Arm%20Development%20Studio
 .. _Linaro Release 20.01: http://releases.linaro.org/members/arm/platforms/20.01
+.. _TrustedFirmware.org: https://www.trustedfirmware.org/