pinctrl: aw9523: use enable for regulator

devm_regulator_get_enable_optional can be used to simplify the logic
here.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://lore.kernel.org/20241001212724.309320-2-rosenp@gmail.com


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