ASoC: add audio-graph-scu-card support

OF-graph base DT binding is used on V4L2, and ALSA SoC is using
different style of DT today. Now ALSA SoC supports simple-card driver
for generic/simple sound card, and we have simple-scu-card driver
for simple-card + ALSA DPCM case.
In the future, V4L2 / ALSA will support HDMI, and then, DT bindings
between V4L2 / ALSA should be merged.
This patch adds new Audio Graph SCU Card which is OF-graph base of
simple-scu-card
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/Kconfig

@@ -22,3 +22,12 @@ config SND_AUDIO_GRAPH_CARD
 	help
 	  This option enables generic simple simple sound card support
 	  with OF-graph DT bindings.
+
+config SND_AUDIO_GRAPH_SCU_CARD
+	tristate "ASoC Audio Graph SCU sound card support"
+	depends on OF
+	select SND_SIMPLE_CARD_UTILS
+	help
+	  This option enables generic simple SCU sound card support
+	  with OF-graph DT bindings.
+	  It supports DPCM of multi CPU single Codec ststem.

sound/soc/generic/Makefile

@@ -2,8 +2,10 @@ snd-soc-simple-card-utils-objs	:= simple-card-utils.o
 snd-soc-simple-card-objs	:= simple-card.o
 snd-soc-simple-scu-card-objs	:= simple-scu-card.o
 snd-soc-audio-graph-card-objs	:= audio-graph-card.o
+snd-soc-audio-graph-scu-card-objs	:= audio-graph-scu-card.o
 
 obj-$(CONFIG_SND_SIMPLE_CARD_UTILS)	+= snd-soc-simple-card-utils.o
 obj-$(CONFIG_SND_SIMPLE_CARD)		+= snd-soc-simple-card.o
 obj-$(CONFIG_SND_SIMPLE_SCU_CARD)	+= snd-soc-simple-scu-card.o
 obj-$(CONFIG_SND_AUDIO_GRAPH_CARD)	+= snd-soc-audio-graph-card.o
+obj-$(CONFIG_SND_AUDIO_GRAPH_SCU_CARD)	+= snd-soc-audio-graph-scu-card.o