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

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Shawn Guo <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/pwm/pwm-mxs.c

···
 {
 	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[] = {