doc: Move content to new About chapter

This new chapter is created to hold project-related info
such as methods of contact, supported platforms, and so on.

Change-Id: Ifece3a8d9ba7f7862416a0c81a8707833da4aec7
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
diff --git a/docs/about/platforms.rst b/docs/about/platforms.rst
new file mode 100644
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--- /dev/null
+++ b/docs/about/platforms.rst
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+Platforms
+=========
+
+Juno Arm Development Platform
+-----------------------------
+
+The AArch64 build of this release has been tested on variants r0, r1 and r2 of
+the `Juno Arm Development Platform`_. The AArch32 build has only been tested on
+variant r0.
+
+Armv8 Architecture Fixed Virtual Platforms
+------------------------------------------
+
+The AArch64 build has been tested on the following Armv8 Architecture Fixed
+Virtual Platforms (`FVP`_):
+
+-  ``FVP_Base_AEMv8A-AEMv8A``
+-  ``FVP_Base_Cortex-A35x4``
+-  ``FVP_Base_Cortex-A57x4-A53x4``
+-  ``FVP_Base_RevC-2xAEMv8A``
+-  ``Foundation_Platform``
+
+The AArch32 build has been tested on the following `FVP`_\ s:
+
+-  ``FVP_Base_Cortex-A32x4``
+-  ``FVP_Base_RevC-2xAEMv8A``
+
+NOTE: Unless otherwise stated, the model version is version 11.6, build 45.
+
+System Guidance for Infrastructure Fixed Virtual Platforms
+----------------------------------------------------------
+
+The AArch64 build has been tested on the following Fixed Virtual Platforms
+(`FVP`_):
+
+-  ``FVP_CSS_SGI-575``
+-  ``FVP_RD_N1Edge``
+
+NOTE:
+
+-  For ``FVP_CSS_SGI-575`` and ``FVP_RD_N1Edge``, internal version of the
+   models were used.
+
+--------------
+
+*Copyright (c) 2019, Arm Limited. All rights reserved.*