pinctrl: meson: fix pin input property for a4

The register of pin input attribute means the opposite.
value of reigster meaning is 1 for input and 0 for output.
So fix it.

Fixes: 6e9be3ab ("pinctrl: Add driver support for Amlogic SoCs")
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Link: https://lore.kernel.org/20250303-fix-a4-pinctl-v1-1-6579888b4272@amlogic.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>