gpio: msm-common: Set irq attributes on irqdomain map call

The current code sets up irq attributes at postcore_init. But
with irqdomains, irqs are mapped later at runtime. Thus we need
to set these parameters within the irqdomain map routine for
systems that are using Device Tree.

Change-Id: I185ebc4efdb194d690ecbec75171709bd09e0588
Signed-off-by: Michael Bohan <mbohan@codeaurora.org>