ALSA: ASoC - clean up Kconfig for TLV320AIC2

Removed unnecessary dependency.  Also, make it uninteractive, as it's
only for selection by other configs.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index bdead2d..11eebce 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -68,8 +68,8 @@
 	depends on I2C
 
 config SND_SOC_TLV320AIC26
-	tristate "TI TLV320AIC26 Codec support"
-	depends on SND_SOC && SPI
+	tristate
+	depends on SPI
 
 config SND_SOC_TLV320AIC3X
 	tristate