ASoC: soc-card: move snd_soc_card_get_kcontrol() to soc-card

Card related function should be implemented at soc-card now.
This patch moves 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/87a71s25kj.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/soc-card.h b/include/sound/soc-card.h
index 997809b..c601edd 100644
--- a/include/sound/soc-card.h
+++ b/include/sound/soc-card.h
@@ -8,4 +8,7 @@
 #ifndef __SOC_CARD_H
 #define __SOC_CARD_H
 
+struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
+					       const char *name);
+
 #endif /* __SOC_CARD_H */