feat: add test to verify unused ns el2 configuration

This test verifies the TF-A config INIT_UNUSED_NS_EL2. This macro
gaurds the code which is required to do a minimum initialization of
NS-EL2 for the systems which directly jumps to NS-EL1 from EL3.

This test applies a patch which runs TFTF at NS-EL1.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: Ibe7e44ebd45f7afa4c5f97de22b2281d3d27068e
4 files changed