refactor(tc): deprecate Arm TC1 FVP platform

Arm has made the strategic decision to deprecate the TC1 platform.
Consequently, software development and the creation of fast models
for the TC1 platform have been officially discontinued.
The TC1 platform, now considered obsolete, has been succeeded by
the TC2 platform. It's noteworthy that the TC2 platform is already
integrated and supported in both TF-A and CI repositories.

Change-Id: Ia196a5fc975b4dbf3c913333daf595199968d95d
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index f135ca2..b1ccaa5 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -79,6 +79,8 @@
 +----------------+----------------+--------------------+--------------------+
 |    tc0         |      Arm       |        2.8         |       2.10         |
 +----------------+----------------+--------------------+--------------------+
+|    tc1         |      Arm       |        2.10        |       TBD          |
++----------------+----------------+--------------------+--------------------+
 |    rde1edge    |      Arm       |        2.9         |       3.0          |
 +----------------+----------------+--------------------+--------------------+