ASoC: tlv320aic32x4: Add SPI support

Add support for running the tlv32x4 control channel over SPI rather than I2C.

Signed-off-by: Jeremy McDermond <nh6z@nh6z.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 38d07c3..3cc56e7 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -130,6 +130,7 @@
 	select SND_SOC_TLV320AIC26 if SPI_MASTER
 	select SND_SOC_TLV320AIC31XX if I2C
 	select SND_SOC_TLV320AIC32X4_I2C if I2C
+	select SND_SOC_TLV320AIC32X4_SPI if SPI_MASTER
 	select SND_SOC_TLV320AIC3X if I2C
 	select SND_SOC_TPA6130A2 if I2C
 	select SND_SOC_TLV320DAC33 if I2C
@@ -774,6 +775,11 @@
 	depends on I2C
 	select SND_SOC_TLV320AIC32X4
 
+config SND_SOC_TLV320AIC32X4_SPI
+	tristate
+	depends on SPI_MASTER
+	select SND_SOC_TLV320AIC32X4
+
 config SND_SOC_TLV320AIC3X
 	tristate "Texas Instruments TLV320AIC3x CODECs"
 	depends on I2C