ASoC: simple-card: use asoc_simple_card_of_parse_widgets()

Current simple card driver is supporting widgets on DT,
other simple/audio card drivers will support it.
Encapsulation is one of simple card util's purpose.
Let's use asoc_simple_card_of_parse_widgets
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card.c

@@ -354,13 +354,9 @@ static int asoc_simple_card_parse_of(struct simple_card_data *priv)
 
 	dai_link = of_get_child_by_name(node, PREFIX "dai-link");
 
-	/* The off-codec widgets */
-	if (of_property_read_bool(node, PREFIX "widgets")) {
-		ret = snd_soc_of_parse_audio_simple_widgets(card,
-					PREFIX "widgets");
-		if (ret)
-			goto card_parse_end;
-	}
+	ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
+	if (ret < 0)
+		goto card_parse_end;
 
 	ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
 	if (ret < 0)