pinctrl: remove remaining users of gpiochip_remove() retval

Some drivers accidentally still use the return value from
gpiochip_remove(). Get rid of them so we can simplify this function
and get rid of the return value.

Cc: Abdoulaye Berthe <berthe.ab@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sirf/pinctrl-sirf.c

@@ -877,8 +877,7 @@ static int sirfsoc_gpio_probe(struct device_node *np)
 
 out_no_range:
 out_banks:
-	if (gpiochip_remove(&sgpio->chip.gc))
-		dev_err(&pdev->dev, "could not remove gpio chip\n");
+	gpiochip_remove(&sgpio->chip.gc);
 out:
 	iounmap(regs);
 	return err;