pinctrl: meson: add pinctrl driver support for Meson-S4 Soc

Add new pinctrl driver for Amlogic's Meson-S4 SoC which share the
same register layout as the previous Meson-A1.

Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Qianggui Song <qianggui.song@amlogic.com>
Link: https://lore.kernel.org/r/20220113031044.2665-4-qianggui.song@amlogic.com


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