feat(idte3): add support to detect and test FEAT_IDTE3

Add new defines for ID_AA64MMFR2_EL1.IDS and SCR_EL3.TID3/TID5
to support FEAT_IDTE3 detection. A helper function is added to
check for this feature, and the SMCCC feature availability test
is updated to verify IDTE3 presence.

Change-Id: Ib9471a838381439214a61feeed96796e406a9cb7
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
3 files changed