spm: add support for new hafnium/spm repo

Add build package scripts and test desc generator for hafnium/spm
repository.

Change-Id: I54fc34cf1f58a8f4b0b162379d294c11d373c57d
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
2 files changed