ARM: dts: sun8i: A23/A33: Fix pinctrl node names

The NAND pinctrl nodes names don't follow the pattern we've used and
enforced for some time. Make sure they do.

Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>