irq: display the wakeup depth and disable depth of an irq

The disable depth helps to track whether the interrupt is disabled
of not. This is immensely useful in debugging interrupt related issues
esp in cases when the driver enables/disables a device's
interrupt at runtime.

Also, the wakeup depth helps to track which interrupts are configured
as wakeup. This helps to debug issues related to an interrupt not waking
up the system if it were configured a wakeup interrupt.

Add code to show the wakeup depth and disable depth.

Change-Id: I780a8f7dd24d4acfb2da98761c873dd09a154a2e
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>