ASoC: SOF: keep prepare/unprepare widgets in sink path

The existing code return when a widget doesn't need to
prepare/unprepare. This will prevent widgets in the sink path from being
prepared/unprepared.

Cc: <stable@vger.kernel.org> # 6.1
Link: thesofproject#4021
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230118101255.29139-4-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: bardliao

sound/soc/sof/sof-audio.c

@@ -271,16 +271,17 @@ sof_unprepare_widgets_in_path(struct snd_sof_dev *sdev, struct snd_soc_dapm_widg
 	struct snd_sof_widget *swidget = widget->dobj.private;
 	struct snd_soc_dapm_path *p;
 
-	/* return if the widget is in use or if it is already unprepared */
+	/* skip if the widget is in use or if it is already unprepared */
 	if (!swidget || !swidget->prepared || swidget->use_count > 0)
-		return;
+		goto sink_unprepare;
 
 	if (widget_ops[widget->id].ipc_unprepare)
 		/* unprepare the source widget */
 		widget_ops[widget->id].ipc_unprepare(swidget);
 
 	swidget->prepared = false;
 
+sink_unprepare:
 	/* unprepare all widgets in the sink paths */
 	snd_soc_dapm_widget_for_each_sink_path(widget, p) {
 		if (!p->walking && p->sink->dobj.private) {