Core: Fix: disable non-secure exception handling

Disable NS exceptions during secure service execution.
This is needed to fix a side-effect introduced with the
thread mode NS-S transition change (merged in commit 158bf18).

Change-Id: Ibee405644f095e81949772f182acfcc3d0b90b14
Signed-off-by: Miklos Balint <miklos.balint@arm.com>
2 files changed