[ALSA] ASoC: Build files

This patch adds support for building the ASoC core and the dynamic audio
power management support.

Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
new file mode 100644
index 0000000..200709f
--- /dev/null
+++ b/sound/soc/Kconfig
@@ -0,0 +1,19 @@
+#
+# SoC audio configuration
+#
+
+menu "SoC audio support"
+	depends on SND!=n
+
+config SND_SOC
+	tristate "SoC audio support"
+	---help---
+
+	  If you want SoC support, you should say Y here and also to the
+	  specific driver for your SoC below. You will also need to select the
+	  specific codec(s) attached to the SoC
+
+	  This SoC audio support can also be built as a module.  If so, the module
+	  will be called snd-soc-core.
+
+endmenu