Tegra194: report failure to enable dual execution
Tegra194: report failure to enable dual execution

During boot the platform enables dual execution for Xavier CPUs.
This patch reads back the ACTLR_ELx register to verify that the bit
is actually set. It asserts if the bit is not set.

Change-Id: I5ba9491ced86285d307b95efa647a427ff77c79e
Signed-off-by: Kalyani Chidambaram Vaidyanathan <867f319f492b092f09933284a30504d604729758@nvidia.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware