docs: move common build option from Arm-specific to common file

Moved common build options from Arm-specific file to common build
file.

Change-Id: If74b6223972ae3a6c11d9f9d2fbd8d2ee008b6e5
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst
index 7ca8aa9..466454a 100644
--- a/docs/getting_started/build-options.rst
+++ b/docs/getting_started/build-options.rst
@@ -45,6 +45,12 @@
    compiling TF-A. Its value must be a numeric, and defaults to 0. See also,
    *Armv8 Architecture Extensions* in :ref:`Firmware Design`.
 
+-  ``ARM_BL2_SP_LIST_DTS``: Path to DTS file snippet to override the hardcoded
+   SP nodes in tb_fw_config.
+
+-  ``ARM_SPMC_MANIFEST_DTS`` : path to an alternate manifest file used as the
+   SPMC Core manifest. Valid when ``SPD=spmd`` is selected.
+
 -  ``BL2``: This is an optional build option which specifies the path to BL2
    image for the ``fip`` target. In this case, the BL2 in the TF-A will not be
    built.
@@ -727,6 +733,10 @@
    1 (do save and restore). 0 is the default. An SPD may set this to 1 if it
    wants the timer registers to be saved and restored.
 
+-  ``OPTEE_SP_FW_CONFIG``: DTC build flag to include OP-TEE as SP in
+   tb_fw_config device tree. This flag is defined only when
+   ``ARM_SPMC_MANIFEST_DTS`` manifest file name contains pattern optee_sp.
+
 -  ``OVERRIDE_LIBC``: This option allows platforms to override the default libc
    for the BL image. It can be either 0 (include) or 1 (remove). The default
    value is 0.
@@ -936,6 +946,9 @@
       When ``EL3_EXCEPTION_HANDLING`` is ``1``, ``TSP_NS_INTR_ASYNC_PREEMPT``
       must also be set to ``1``.
 
+-  ``TS_SP_FW_CONFIG``: DTC build flag to include Trusted Services (Crypto and
+   internal-trusted-storage) as SP in tb_fw_config device tree.
+
 -  ``TWED_DELAY``: Numeric value to be set in order to delay the trapping of
    WFE instruction. ``ENABLE_FEAT_TWED`` build option must be enabled to set
    this delay. It can take values in the range (0-15). Default value is ``0``
diff --git a/docs/plat/arm/arm-build-options.rst b/docs/plat/arm/arm-build-options.rst
index e0b9242..3179267 100644
--- a/docs/plat/arm/arm-build-options.rst
+++ b/docs/plat/arm/arm-build-options.rst
@@ -109,19 +109,6 @@
    (```ethosn.bin```). This firmware image will be included in the FIP and
    loaded at runtime.
 
--  ``ARM_SPMC_MANIFEST_DTS`` : path to an alternate manifest file used as the
-   SPMC Core manifest. Valid when ``SPD=spmd`` is selected.
-
--  ``ARM_BL2_SP_LIST_DTS``: Path to DTS file snippet to override the hardcoded
-   SP nodes in tb_fw_config.
-
--  ``OPTEE_SP_FW_CONFIG``: DTC build flag to include OP-TEE as SP in tb_fw_config
-   device tree. This flag is defined only when ``ARM_SPMC_MANIFEST_DTS`` manifest
-   file name contains pattern optee_sp.
-
--  ``TS_SP_FW_CONFIG``: DTC build flag to include Trusted Services (Crypto and
-   internal-trusted-storage) as SP in tb_fw_config device tree.
-
 -  ``ARM_GPT_SUPPORT``: Enable GPT parser to get the entry address and length of
    the various partitions present in the GPT image. This support is available
    only for the BL2 component, and it is disabled by default.