feat(tc): specify MHU version based on platform

Platforms older than TC2 contain MHUv2 well as newer platforms contain
MHUv3. Set the Makefile variable accordingly.

Change-Id: I00b83a34908cdbf7d1d9ac39728e3fa6ef449d2c
Signed-off-by: Jackson Cooper-Driver <jackson.cooper-driver@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
1 file changed