pinctrl: mediatek: add pinctrl/GPIO/EINT driver for mt8127

MT8127 pinctrl/eint are similar to mt8135 and mt8173, add
support for mt8127 using mediatek common pinctrl driver.

Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>