ASoC: CS8427: Add initial driver for cs8427 chip

Introduce initial cs8427 driver which is compliant
To ASoC codec driver standards.

Change-Id: Ie4fc0a3fc9b97f3ab0fbac2f0a3232078035fdae
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 88181a6..2b2c821 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -256,6 +256,9 @@
 config SND_SOC_WCD9310
         tristate
 
+config SND_SOC_CS8427
+	tristate
+
 config SND_SOC_WL1273
 	tristate