linux-phytec-ti

gpio: davinci: Store both irqs into the controller

There are 32 GPIOs per controller which means 2 banks with 16 gpios
and 2 separate irqs. Hence store the both the irq numbers for the
controller which makes it easier to distnguish the bank in irq handler.

Signed-off-by: Keerthy <j-keerthy@ti.com>