pinctrl: qcom: Remove irq_disable callback from msmmgpio irqchip

The gpio can be marked for wakeup and drivers can invoke disable_irq()
durig suspend, in such cases non-lazy approch will also disable at HW
and such gpios will not wakeup from low power modes like suspend to RAM.

Removing irq_disable callback will allow gpio interrupts to lazy disable
from genirq.

Change-Id: I76ac0de5a5955c8490bb063cba763d391f4a0752
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>