gpio: vf610: fix compilation error

Fix compilation error by explicitly adding the missing include.

drivers/gpio/gpio-vf610.c: In function ‘vf610_gpio_direction_input’:
drivers/gpio/gpio-vf610.c:120:9: error: implicit declaration of function ‘pinctrl_gpio_direction_input’; did you mean ‘vf610_gpio_direction_input’? [-Werror=implicit-function-declaration]
  120 |  return pinctrl_gpio_direction_input(chip->base + gpio);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |         vf610_gpio_direction_input

Fixes: 30a35c0 ("gpio: vf610: drop the SOC_VF610 dependency for GPIO_VF610")
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: rleon

drivers/gpio/gpio-vf610.c

@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
 
 #define VF610_GPIO_PER_PORT		32