ASoC: rt711-sdw: use cancel_work_sync() for .remove

Make sure the workqueues are not running after the .remove() callback,
which can lead to timeout errors.

A previous fix to use cancel_work_sync was applied for the suspend
case but the remove case is missing

Fixes: 501ef013 ('ASoC: rt711: wait for the delayed work to finish when the system suspends')
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Link: https://lore.kernel.org/r/20210204201739.25206-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt711-sdw.c

@@ -463,8 +463,8 @@ static int rt711_sdw_remove(struct sdw_slave *slave)
 	struct rt711_priv *rt711 = dev_get_drvdata(&slave->dev);
 
 	if (rt711 && rt711->hw_init) {
-		cancel_delayed_work(&rt711->jack_detect_work);
-		cancel_delayed_work(&rt711->jack_btn_check_work);
+		cancel_delayed_work_sync(&rt711->jack_detect_work);
+		cancel_delayed_work_sync(&rt711->jack_btn_check_work);
 		cancel_work_sync(&rt711->calibration_work);
 	}