feat(drtm): invalidate icache before DLME launch

As per DRTM beta0 spec table #28, Before the DLME is called the DCE
must invalidate all instruction caches.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I7efbb03d1d13346a8d898882fdbd7bbe8f1d49b2
1 file changed