Add the pinctrl bindings for the X1500 Soc from Ingenic.
Signed-off-by: NZhou Yanjie <zhouyanjie@zoho.com>
Link: https://lore.kernel.org/r/1563076436-5338-6-git-send-email-zhouyanjie@zoho.comSigned-off-by: NLinus Walleij <linus.walleij@linaro.org>