gpio/rockchip: handle deferring input-enable pinconfs

Add support for deferred PIN_CONFIG_INPUT_ENABLE handling.

Signed-off-by: Caleb Connolly <kc@postmarketos.org>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
Link: https://lore.kernel.org/r/20220328005005.72492-4-kc@postmarketos.org


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