Only IRQs that have enable_irq_wake() called on them can wake the system
from sleep or after it has been shut down. Currently, the RTC alarm can
only wake the system from sleep. Run the suspend callback to arm the IRQ
during the shutdown process, so the RTC alarm also works after shutdown.
Signed-off-by: Samuel Holland <samuel@sholland.org>
e3eaef8ae5