pwm: pwm-mxs: Return proper error if pwmchip_remove() fails

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

drivers/pwm/pwm-mxs.c

@@ -178,9 +178,7 @@ static int __devexit mxs_pwm_remove(struct platform_device *pdev)
 {
 	struct mxs_pwm_chip *mxs = platform_get_drvdata(pdev);
 
-	pwmchip_remove(&mxs->chip);
-
-	return 0;
+	return pwmchip_remove(&mxs->chip);
 }
 
 static struct of_device_id mxs_pwm_dt_ids[] = {