ARM: sun9i: Enable the A80 pinctrl driver

The A80 pinctrl driver is just as usual our pinctrl/gpio/external interrupt
controller.

Nothing really out of the extraordinary here...

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>