ANDROID: irqchip/gic-v2: Deactivate unhandled interrupts

If an (unmaskable) interrupt triggered before a handler was registered
the interrupt was not deactivated and would be permanently unusable.

Bug: 263383868
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Change-Id: I09f277ffb29d3467cc9544629447386b9e04f473