chore(tc): mark TC2 platform as deprecated in Makefile

Following recent commit [1], update the Makefile to mark
the TC2 platform as deprecated and trigger a build failure
if someone attempts to build the TC0 or TC1 platform.

[1]: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/31702

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ib6ed4933328e35209443ceec59f1e2056881f927
diff --git a/plat/arm/board/tc/platform.mk b/plat/arm/board/tc/platform.mk
index 3ef25de..9cd3011 100644
--- a/plat/arm/board/tc/platform.mk
+++ b/plat/arm/board/tc/platform.mk
@@ -61,6 +61,10 @@
 endif
 
 ifneq ($(shell expr $(TARGET_PLATFORM) \<= 1), 0)
+        $(error Platform ${PLAT}$(TARGET_PLATFORM) is no longer available.)
+endif
+
+ifneq ($(shell expr $(TARGET_PLATFORM) = 2), 0)
         $(warning Platform ${PLAT}$(TARGET_PLATFORM) is deprecated. \
           Some of the features might not work as expected)
 endif