Add a helper for registering BCM63XX pin controllers.
Co-developed-by: NJonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: NJonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com>
Link: https://lore.kernel.org/r/20210324081923.20379-5-noltari@gmail.comSigned-off-by: NLinus Walleij <linus.walleij@linaro.org>