pinctrl: digicolor: 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>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/20230113143640.24302-1-andriy.shevchenko@linux.intel.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-digicolor.c

@@ -248,7 +248,6 @@ static int dc_gpiochip_add(struct dc_pinmap *pmap)
 	chip->set		= dc_gpio_set;
 	chip->base		= -1;
 	chip->ngpio		= PINS_COUNT;
-	chip->of_gpio_n_cells	= 2;
 
 	spin_lock_init(&pmap->lock);