ASoC: sta32x: minor Kconfig update.

- Add description for the driver
- Add dependency on the I2C module

Signed-off-by: Thomas Niederprüm <niederp@physik.uni-kl.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 27e1e3b..c63ee0e 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -580,7 +580,8 @@
 	depends on I2C
 
 config SND_SOC_STA32X
-	tristate
+	tristate "STA326, STA328 and STA329 speaker amplifier"
+	depends on I2C
 	select REGMAP_I2C
 
 config SND_SOC_STA350