pinctrl: Add driver support for Amlogic C3 SoCs

Add a new pinctrl driver for Amlogic C3 SoCs which share
the same register layout as the previous Amlogic S4.

Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com>
Link: https://lore.kernel.org/r/20230714122441.3098337-3-huqiang.qin@amlogic.com


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