build: deprecate Arm TC0 FVP platform

Arm has decided to deprecate the TC0 platform. The development of
software and fast models for TC0 platform has been discontinued.
TC0 platform has been superseded by the TC1 and TC2 platforms,
which are already supported in TF-A and CI repositories.

Change-Id: I0269816a6ee733f732669027eae4e14cd60b6084
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index f1b97f8..3eac6f7 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -75,6 +75,8 @@
 +----------------+----------------+--------------------+--------------------+
 |    rdn1edge    |      Arm       |        2.8         |       3.0          |
 +----------------+----------------+--------------------+--------------------+
+|    tc0         |      Arm       |        2.8         |       3.0          |
++----------------+----------------+--------------------+--------------------+
 
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