[PATCH] nmk-gpio: use request_irq instead of chained handler

Rabin,

__nmk_gpio_irq_handler doesn't do anything more that what a normal handler
does, so it can become one.  This is also needed for changing the GIC
implementation to a different flow handler.

Signed-off-by: Rabin Vincent <redacted>

mach-nomadik only seems to use the vic. Why does this GPIO handler
need updating?

Will