gpio: zevio: Remove duplicate assignment of of_gpio_n_cells

The of_gpio_n_cells default is 2 when ->of_xlate() callback is
not defined. No need to assign it explicitly in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-zevio.c

@@ -162,7 +162,6 @@ static const struct gpio_chip zevio_gpio_chip = {
 	.base			= 0,
 	.owner			= THIS_MODULE,
 	.ngpio			= 32,
-	.of_gpio_n_cells	= 2,
 };
 
 /* Initialization */