pwm: cros-ec: Don't check the return code of pwmchip_remove()

pwmchip_remove() returns always 0. Don't use the value to make it
possible to eventually change the function to return void. Also the
driver core ignores the return value of cros_ec_pwm_remove().

Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/pwm/pwm-cros-ec.c

···
 	struct cros_ec_pwm_device *ec_pwm = platform_get_drvdata(dev);
 	struct pwm_chip *chip = &ec_pwm->chip;
 
-	return pwmchip_remove(chip);
+	pwmchip_remove(chip);
+
+	return 0;
 }
 
 #ifdef CONFIG_OF