fix(interrupts): deny new direct request message from endpoint

Please refer to detailed description in the comment preceding the
helper function introduced in cactus_interrupt.c file.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: Ie70d68514dac44211767d611db6d84991a8b48c6
4 files changed