trusty: Include file with GIC definitions

The GIC definitions used in this file have to be provided by the platform
but platform_def.h wasn't included.

Change-Id: I858cdf7e60c50577c8e798d64ec2cbc4f067f33b
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
1 file changed