This is a GPIO driver so it should include
<linux/gpio/driver.h> not <linux/gpio.h>

Link: https://lore.kernel.org/r/20190820103429.7028-1-linus.walleij@linaro.org
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>