pinctrl: sh-pfc: gpio: Return early in gpio_pin_to_irq()

As of commit 4adeabd0 ("pinctrl: sh-pfc: Remove hardcoded IRQ
numbers"), only a single operation needs to be performed after finding
the wanted pin.  Hence decrease the needed attention span of the casual
reader by replacing the goto by a direct return.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20200212090200.11106-1-geert+renesas@glider.be

drivers/pinctrl/sh-pfc/gpio.c

@@ -205,14 +205,11 @@ static int gpio_pin_to_irq(struct gpio_chip *gc, unsigned offset)
 
 		for (k = 0; gpios[k] >= 0; k++) {
 			if (gpios[k] == offset)
-				goto found;
+				return pfc->irqs[i];
 		}
 	}
 
 	return 0;
-
-found:
-	return pfc->irqs[i];
 }
 
 static int gpio_pin_setup(struct sh_pfc_chip *chip)