doc: Normalise section numbering and headings

Required work to make all documents sit at the correct levels within
the document tree and any derived content like the table of contents
and the categories in the sidebar.

Change-Id: I4885fbe30864a87c8822ee67482b71fb46a8fbc6
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
diff --git a/docs/components/spd/index.rst b/docs/components/spd/index.rst
index e03bfe3..25d0124 100644
--- a/docs/components/spd/index.rst
+++ b/docs/components/spd/index.rst
@@ -4,7 +4,6 @@
 .. toctree::
    :maxdepth: 1
    :caption: Contents
-   :numbered:
 
    optee-dispatcher
    tlk-dispatcher
diff --git a/docs/components/spd/tlk-dispatcher.rst b/docs/components/spd/tlk-dispatcher.rst
index 90af5fa..a6c658c 100644
--- a/docs/components/spd/tlk-dispatcher.rst
+++ b/docs/components/spd/tlk-dispatcher.rst
@@ -15,7 +15,7 @@
 to the build command.
 
 Trusted Little Kernel (TLK)
-===========================
+---------------------------
 
 TLK is a Trusted OS running as Secure EL1. It is a Free Open Source Software
 (FOSS) release of the NVIDIA® Trusted Little Kernel (TLK) technology, which
@@ -54,20 +54,20 @@
 manual located under the "documentation" directory\_.
 
 Build TLK
-=========
+---------
 
 To build and execute TLK, follow the instructions from "Building a TLK Device"
 section from Tegra\_BSP\_for\_Android\_TLK\_FOSS\_Reference.pdf manual.
 
 Input parameters to TLK
-=======================
+-----------------------
 
 TLK expects the TZDRAM size and a structure containing the boot arguments. BL2
 passes this information to the EL3 software as members of the bl32\_ep\_info
 struct, where bl32\_ep\_info is part of bl31\_params\_t (passed by BL2 in X0)
 
-Example:
---------
+Example
+~~~~~~~
 
 ::
 
diff --git a/docs/components/spd/trusty-dispatcher.rst b/docs/components/spd/trusty-dispatcher.rst
index be08570..a3cb829 100644
--- a/docs/components/spd/trusty-dispatcher.rst
+++ b/docs/components/spd/trusty-dispatcher.rst
@@ -9,7 +9,7 @@
 https://source.android.com/security/trusty
 
 Boot parameters
-===============
+---------------
 
 Custom boot parameters can be passed to Trusty by providing a platform
 specific function:
@@ -26,7 +26,7 @@
 should then be set to the size of that block.
 
 Supported platforms
-===================
+-------------------
 
 Out of all the platforms supported by Trusted Firmware-A, Trusty is only
 verified and supported by NVIDIA's Tegra SoCs.