soc: qcom: smp2p: Add enable_irq_wake to SMP2P IRQ

SMP2P interrupts are expected to wake the processor from suspend.
Do not use the IRQF_NO_SUSPEND flag to handle during suspend path.
Instead rely on the suspend framework to resume and re-trigger the
threaded interrupt.

Change-Id: I22470f7076e71e73f3c7b345ad7e0a5de420225c
Signed-off-by: Chris Lew <clew@codeaurora.org>