feat(fvp): replace managed-exit with ns-interrupts-action

Commit 10b292e64933 ("docs(spm): update FF-A manifest binding")
deprecated managed-exit in favor of newly added mandatory
ns-interrupts-action attribute. Replace managed-exit with
ns-interrupts-action before it becomes obsolete.

Change-Id: I9b55f6c55af3510260a9c5a01755a9b66d75823e
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
1 file changed