sound: Convert to menuconfig

Convert menu in sound Kconfig files to menuconfig and if.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 18f28ac..fd7bc4f 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -2,15 +2,8 @@
 # SoC audio configuration
 #
 
-menu "System on Chip audio support"
-	depends on SND!=n
-
-config SND_SOC_AC97_BUS
-	bool
-
-config SND_SOC
+menuconfig SND_SOC
 	tristate "ALSA for SoC audio support"
-	depends on SND
 	select SND_PCM
 	---help---
 
@@ -23,6 +16,11 @@
 	  This ASoC audio support can also be built as a module.  If so, the module
 	  will be called snd-soc-core.
 
+if SND_SOC
+
+config SND_SOC_AC97_BUS
+	bool
+
 # All the supported Soc's
 source "sound/soc/at91/Kconfig"
 source "sound/soc/pxa/Kconfig"
@@ -35,4 +33,5 @@
 # Supported codecs
 source "sound/soc/codecs/Kconfig"
 
-endmenu
+endif	# SND_SOC
+