driver:gpio remove all usage of gpio_remove retval in driver

this remove all reference to gpio_remove retval in all driver
except pinctrl and gpio. the same thing is done for gpio and
pinctrl in two different patches.

Signed-off-by: Abdoulaye Berthe <berthe.ab@gmail.com>
Acked-by: Michael Büsch <m@bues.ch>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/sh/boards/mach-x3proto/gpio.c

@@ -128,10 +128,8 @@ int __init x3proto_gpio_setup(void)
 	return 0;
 
 err_irq:
-	ret = gpiochip_remove(&x3proto_gpio_chip);
-	if (unlikely(ret))
-		pr_err("Failed deregistering GPIO\n");
-
+	gpiochip_remove(&x3proto_gpio_chip);
+	ret = 0;
 err_gpio:
 	synchronize_irq(ilsel);