ARM: dts: sunxi: Fix #interrupt-cells for PIO in H3

pinctrl-sunxi uses 3 cells to describe interrupt, not 2. It's bank
number, pin number and flags.

Signed-off-by: Krzysztof Adamski <k@japko.eu>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>