pinctrl: da9062: add missing include

gpiod_is_active_low() is defined in linux/gpio/consumer.h. It's only
because we're pulling in the gpiolib.h private header that we get this
declaration implicitly but let's fix it as that is going away soon.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-da9062.c

@@ -17,6 +17,7 @@
 #include <linux/property.h>
 #include <linux/regmap.h>
 
+#include <linux/gpio/consumer.h>
 #include <linux/gpio/driver.h>
 
 #include <linux/mfd/da9062/core.h>