pinctrl: aw9523: fix kerneldoc for _aw9523_gpio_get_multiple()

The parameters' descriptions are wrong, drop the invalid ones and
document the ones that are missing the description.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/20241010080347.7759-1-brgl@bgdev.pl


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