ASoC: soc-card: add snd_soc_card_set_bias_level()

Card related function should be implemented at soc-card now.
This patch adds it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/87sgfkzv4g.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/soc-card.c b/sound/soc/soc-card.c
index 920967a..dbcaa3d 100644
--- a/sound/soc/soc-card.c
+++ b/sound/soc/soc-card.c
@@ -179,3 +179,15 @@ int snd_soc_card_remove(struct snd_soc_card *card)
 
 	return soc_card_ret(card, ret);
 }
+
+int snd_soc_card_set_bias_level(struct snd_soc_card *card,
+				struct snd_soc_dapm_context *dapm,
+				enum snd_soc_bias_level level)
+{
+	int ret = 0;
+
+	if (card && card->set_bias_level)
+		ret = card->set_bias_level(card, dapm, level);
+
+	return soc_card_ret(card, ret);
+}