feat(amd): add test for TF-A register sgi API

Adds a test to verify the tf_a_register_sgi() API, which registers
the IPI interrupt with the system.

Change-Id: I3be28dc6c4ddec274cb64c8148fe0b61a1ab7b34
Signed-off-by: Madhav Bhatt <madhav.bhatt@amd.com>
5 files changed