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: NTakashi Iwai <tiwai@suse.de>

sound/soc/codecs/Kconfig

@@ -68,8 +68,8 @@ config SND_SOC_TLV320AIC23
 	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