ALSA: ASoC: Add WM8900 CODEC driver

The WM8900 is designed for portable multimedia applications requiring
low power consumption, high performance audio and a compact form factor
providing:

 - 24 bit stereo ADC and DAC
 - Microphone and line inputs
 - Line outputs
 - Class G headphone amplifier

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 1c93423..d7bacf6 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -8,6 +8,7 @@
 	select SND_SOC_WM8731
 	select SND_SOC_WM8750
 	select SND_SOC_WM8753
+	select SND_SOC_WM8900
 	select SND_SOC_WM8990
 	select SND_SOC_CS4270
 	select SND_SOC_TLV320AIC26
@@ -46,6 +47,9 @@
 config SND_SOC_WM8753
 	tristate
 
+config SND_SOC_WM8900
+	tristate
+
 config SND_SOC_WM8990
 	tristate