usb: gadget: at91-udc: simplify at91rm9200_udc_pullup callback

Just simplify the use of is_on and get rid of superfluous condition.

Cc: gregkh@linuxfoundation.org
Cc: nicolas.ferre@microchip.com
Cc: alexandre.belloni@bootlin.com
Cc: linux-usb@vger.kernel.org
Cc: kernel@pengutronix.de
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

Link: https://lore.kernel.org/r/20221104215516.2874922-2-m.grzeschik@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/at91_udc.c

@@ -1628,10 +1628,7 @@ static int at91rm9200_udc_init(struct at91_udc *udc)
 
 static void at91rm9200_udc_pullup(struct at91_udc *udc, int is_on)
 {
-	if (is_on)
-		gpiod_set_value(udc->board.pullup_pin, 1);
-	else
-		gpiod_set_value(udc->board.pullup_pin, 0);
+	gpiod_set_value(udc->board.pullup_pin, is_on);
 }
 
 static const struct at91_udc_caps at91rm9200_udc_caps = {