pinctrl: sunxi: Add IRQCHIP_SKIP_SET_WAKE flag for pinctrl irq chip

The sunxi pinctrl irq chip driver does not support wakeup at the
moment. Adding IRQCHIP_SKIP_SET_WAKE lets the irqs work with drivers
using wakeup.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>