drivers: pinctrl: msm: fix GIC warning for IRQ_TYPE_NONE

When drivers request GPIO as IRQ, we would not know the trigger type of
the IRQ. Assumption of any one particular type could cause failure if
the driver requests a different trigger type in request_irq.

Use IRQ_TYPE_NONE when creating the mapping for the IRQ, but assume a
trigger type when setting up the parents to avoid GIC from complaining
about incorrect type.

Change-Id: I0443713099b15a11691ae1f7f5dd17b7879577c0
Signed-off-by: Lina Iyer <ilina@codeaurora.org>