MIPS: AR7: convert gpio driver to use gpio_chip_ops

The GPIO controller operations has been split to be stored
on a separate struct gpio_chip_ops virtual function table

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
MIPS: ath79: convert gpio driver to use gpio_chip_ops

The GPIO controller operations has been split to be stored
on a separate struct gpio_chip_ops virtual function table

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
MIPS: BCM63xx: convert gpio driver to use gpio_chip_ops

The GPIO controller operations has been split to be stored
on a separate struct gpio_chip_ops virtual function table

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
MIPS: JZ4740: GPIO: convert driver to use gpio_chip_ops

The GPIO controller operations has been split to be stored
on a separate struct gpio_chip_ops virtual function table

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>