pinctrl: mediatek: dropping original advanced drive configuration function

Function bias_combo getter/setters already handle all cases advanced drive
configuration, include drive for I2C related pins.

Signed-off-by: Guodong Liu <guodong.liu@mediatek.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20220624133700.15487-5-guodong.liu@mediatek.com


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