ASoC: codecs: max98373-sdw: align regmap use with other codecs

It's not clear why this driver has an additional call to
regmap_mark_dirty(), remove to align with others.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Author: plbossart

sound/soc/codecs/max98373-sdw.c

@@ -247,7 +247,7 @@ static __maybe_unused int max98373_suspend(struct device *dev)
 	struct max98373_priv *max98373 = dev_get_drvdata(dev);
 
 	regcache_cache_only(max98373->regmap, true);
-	regcache_mark_dirty(max98373->regmap);
+
 	return 0;
 }