Optionally enable NS IRQ handling during service execution
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Description

Add configuration option to enable NS IRQ handling during service execution.
Turn off by default in keeping with earlier prototype limitations.

wmnt created this task.Sep 4 2018, 3:24 PM
wmnt triaged this task as Normal priority.

Based on @gyuri-szing's comment on the review I split the change to two parts:
https://review.trustedfirmware.org/#/c/174/ only fixes the upstream to keep NS exceptions disabled during secure execution by default as is the current assumption for TF-M.
Change https://review.trustedfirmware.org/#/c/183/ introduces the switch. Gyorgy's comment can be debated separately this way without blocking the fix.