ASoC: rt5645: del btn_check_timer on remove

The timer may still be running when rt5645_i2c_remove() gets called,
call del_timer_sync() to make sure it is stopped.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5645.c

@@ -3897,6 +3897,7 @@ static int rt5645_i2c_remove(struct i2c_client *i2c)
 
 	cancel_delayed_work_sync(&rt5645->jack_detect_work);
 	cancel_delayed_work_sync(&rt5645->rcclock_work);
+	del_timer_sync(&rt5645->btn_check_timer);
 
 	snd_soc_unregister_codec(&i2c->dev);
 	regulator_bulk_disable(ARRAY_SIZE(rt5645->supplies), rt5645->supplies);