ASoC: simple-card: Read pin switches conf from devicetree

When the routing path between a widget (e.g. "Speaker") and the codec
goes through an external amplifier, having a pin switch for this widget
allows the amplifier to be disabled when the widget is not to be used
(e.g. when using headphones).

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card.c

@@ -464,6 +464,10 @@ static int simple_parse_of(struct asoc_simple_priv *priv)
 	if (ret < 0)
 		return ret;
 
+	ret = asoc_simple_parse_pin_switches(card, PREFIX);
+	if (ret < 0)
+		return ret;
+
 	/* Single/Muti DAI link(s) & New style of DT node */
 	memset(&li, 0, sizeof(li));
 	for (li.cpu = 1; li.cpu >= 0; li.cpu--) {