spm: create new groups to test spm/hafnium

Following three set of tests are created to test spm/hafnium:
 - spm-l1-build-tests
 - spm-l2-boot-tests
 - spm-l3-boot-tests

Change-Id: I394ed7f62c85bb21c3db3dc35c0dd99df4c9d402
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
12 files changed