test(realm): test realm pauth state is preserved

Modify Pauth lib to work for multiple CPU
Test if Realm pauth state is preserved for all RECs
on context switch to RMM/NS.

Change-Id: Ibb393b415bab27066289b560be49e02d0c8f58ba
Signed-off-by: Shruti Gupta <shruti.gupta@arm.com>
5 files changed