pinctrl: Ingenic: Add pinctrl driver for X1830.

Add support for probing the pinctrl-ingenic driver on the
X1830 Soc from Ingenic.
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Link: https://lore.kernel.org/r/1576426864-35348-7-git-send-email-zhouyanjie@wanyeetech.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>