feat(rme): add tests to check NS SME ID registers and configurations

These tests checks the functionality of RMM for NS SME support.
- Create Realm and test ID registers specific to SME
- Check if Realm gets undefined abort when it accesses SME
- Check whether RMM preserves NS SMCR_EL2 register

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: Ia8ffd0188297a74c095dbadfb389add50c548e10
9 files changed