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
1 file changed