gpio: Don't override the error code in probe error handling

Otherwise, we return 0 in probe error paths when gpiochip_remove() returns 0.
Also show error message if gpiochip_remove() fails.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Cc: Denis Turischev <denis@compulab.co.il>
Cc: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index b733665..0966f26 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -496,8 +496,7 @@
 err_gpiochip_add:
 	while (--i >= 0) {
 		chip--;
-		ret = gpiochip_remove(&chip->gpio);
-		if (ret)
+		if (gpiochip_remove(&chip->gpio))
 			dev_err(&pdev->dev, "Failed gpiochip_remove(%d)\n", i);
 	}
 	kfree(chip_save);