ASoC: atmel: Atmel WM8904 codec support needs I2C

The WM8904 codec driver needs I2C to be enabled, so the
SND_ATMEL_SOC_WM8904 option also requires this.

Found using randconfig build testing.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NXia Kaixu <kaixu.xia@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/atmel/Kconfig

@@ -35,7 +35,7 @@ config SND_AT91_SOC_SAM9G20_WM8731
 
 config SND_ATMEL_SOC_WM8904
 	tristate "Atmel ASoC driver for boards using WM8904 codec"
-	depends on ARCH_AT91 && ATMEL_SSC && SND_ATMEL_SOC
+	depends on ARCH_AT91 && ATMEL_SSC && SND_ATMEL_SOC && I2C
 	select SND_ATMEL_SOC_SSC
 	select SND_ATMEL_SOC_DMA
 	select SND_SOC_WM8904