pwm: Fix order of freeing resources in pwmchip_remove()

pwmchip_add() calls of_pwmchip_add() only after adding the chip to
pwm_chips and releasing pwm_lock. So the proper order in
pwmchip_remove() is to call of_pwmchip_remove() before taking the mutex
and removing the chip from pwm_chips. This way pwmchip_remove() releases
the resources in reverse order compared to pwmchip_add() requesting
them.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/core.c

@@ -318,13 +318,13 @@ void pwmchip_remove(struct pwm_chip *chip)
 {
 	pwmchip_sysfs_unexport(chip);
 
+	if (IS_ENABLED(CONFIG_OF))
+		of_pwmchip_remove(chip);
+
 	mutex_lock(&pwm_lock);
 
 	list_del_init(&chip->list);
 
-	if (IS_ENABLED(CONFIG_OF))
-		of_pwmchip_remove(chip);
-
 	free_pwms(chip);
 
 	mutex_unlock(&pwm_lock);