ASoC: rt700: wait for the delayed work to finish when the system suspends

To avoid the IO error, we need to cancel the delayed work and wait for it to finish.
Signed-off-by: Shuming Fan <shumingf@realtek.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200921094244.31869-1-shumingf@realtek.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt700-sdw.c

@@ -490,6 +490,9 @@ static int __maybe_unused rt700_dev_suspend(struct device *dev)
 	if (!rt700->hw_init)
 		return 0;
 
+	cancel_delayed_work_sync(&rt700->jack_detect_work);
+	cancel_delayed_work_sync(&rt700->jack_btn_check_work);
+
 	regcache_cache_only(rt700->regmap, true);
 
 	return 0;