trusty: Allow gic base to be specified with GICD_BASE

Some platforms define GICD_BASE instead of PLAT_ARM_GICD_BASE but the
meaning is the same.

Change-Id: I1bb04bb49fdab055b365b1d70a4d48d2058e49df
Signed-off-by: Arve Hjønnevåg <arve@android.com>
1 file changed