ASoC: tlv320aic31xx: Add dependency for I2C and select REGMAP_I2C in Kconfig

The codec can be configured via I2C and using regmap_i2c.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/codecs/Kconfig

@@ -534,6 +534,8 @@ config SND_SOC_TLV320AIC26
 
 config SND_SOC_TLV320AIC31XX
         tristate
+	depends on I2C
+	select REGMAP_I2C
 
 config SND_SOC_TLV320AIC32X4
 	tristate