build(rdaspen): add build config for rdaspen

Add new build configuration files for RD-Aspen platform.

Change-Id: If9ba743f0b99f556827f6d6e96a5990fc2c371af
Signed-off-by: Ahmed Azeem <ahmed.azeem@arm.com>
Signed-off-by: Debbie Horsfall <Debbie.Horsfall@arm.com>
3 files changed