feat(drtm): add a few DRTM DMA protection APIs

Added DRTM DMA protections APIs, and called them during
the DLME launch and DRTM SMC handling.

Change-Id: I29e7238c04e2ca9f26600276c5c05bff5387789e
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
4 files changed