gpio: merrifield: Pass irqchip when adding gpiochip

gpio: merrifield: Pass irqchip when adding gpiochip

We need to convert all old gpio irqchips to pass the irqchip
setup along when adding the gpio_chip. For more info see
drivers/gpio/TODO.

For chained irqchips this is a pretty straight-forward
conversion.

Cc: Andy Shevchenko <[email protected]>
Cc: Mika Westerberg <[email protected]>
Cc: David Cohen <[email protected]>
Cc: Thierry Reding <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>