avr32: add missing CONFIG_SND_ATMEL_SOC config symbol

SVN-Revision: 20135

target/linux/avr32/config-default

@@ -97,6 +97,7 @@ CONFIG_SERIAL_ATMEL_PDC=y
 # CONFIG_SERIAL_ATMEL_TTYAT is not set
 # CONFIG_SND_ATMEL_ABDAC is not set
 # CONFIG_SND_ATMEL_AC97C is not set
+# CONFIG_SND_ATMEL_SOC is not set
 CONFIG_SPI=y
 CONFIG_SPI_ATMEL=y
 # CONFIG_SPI_BITBANG is not set