feat: introduce UNDEF injection test

Test to verify UNDEF injection support in TF-A by trapping FGT register
access from tftf into EL3.

To trap FGT register access to EL3, run the test on model with FEAT_FGT
present but the traps from EL3 are not enabled (ENABLE_FEAT_FGT = 0).

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Ic58ef797c64aad6d17ea33d9fc34e14b4e1a7055
3 files changed