test: ensure mte registers are restored upon context switch

This test aims to validate MTE system registers are restored to
correct values upon world switch triggered by an FF-A direct message
request to an SP.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I9b01d349a0cf0ce557e74cfc70ed5208468e7919
3 files changed