ASoC: codecs: Put the CODEC drivers in a menu

Now they're visible they get a bit noisy.

Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index f0bdcc5..7da528a 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -8,6 +8,8 @@
 	default y if I2C=y
 	default y if SPI_MASTER=y
 
+menu "CODEC drivers"
+
 config SND_SOC_ALL_CODECS
 	tristate "Build all ASoC CODEC drivers"
 	depends on COMPILE_TEST
@@ -584,3 +586,5 @@
 config SND_SOC_TPA6130A2
 	tristate "Texas Instruments TPA6130A2 headphone amplifier"
 	depends on I2C
+
+endmenu