ASoC: Remove adau1701 from SND_SOC_ALL_CODECS due to Sigma dependency

The Sigma code is in drivers/firmware which is only included on a very
small subset of architectures and so ends up breaking the build on
others.  There's a pending patch to make the directory build as standard
but it's not merged yet.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/Kconfig

@@ -17,7 +17,6 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_AD193X if SND_SOC_I2C_AND_SPI
 	select SND_SOC_AD1980 if SND_SOC_AC97_BUS
 	select SND_SOC_AD73311
-	select SND_SOC_ADAU1701 if I2C
 	select SND_SOC_ADS117X
 	select SND_SOC_AK4104 if SPI_MASTER
 	select SND_SOC_AK4535 if I2C