feat(cm): add el1-ctx register helper macros

Adding EL1 context registers related helper macros
necessary to test EL1 context entries.

Change-Id: Ifb0149ad78f951958990290b496e7c1b92c072ea
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
3 files changed