ARM: configs: sama7: enable WM8731 codec driver

The WM8731 codec driver is needed when the Mikroe Proto Codec board
sound card driver is replaced by another sound card (such as Microchip's
ASRC card) and the WM8731 codec is used.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

Author: Codrin Ciubotariu

arch/arm/configs/sama7_defconfig

@@ -163,6 +163,7 @@ CONFIG_SND_MCHP_SOC_ASRC=y
 CONFIG_SND_SOC_DMIC=y
 CONFIG_SND_SOC_PCM5102A=y
 CONFIG_SND_SOC_SPDIF=y
+CONFIG_SND_SOC_WM8731=m
 CONFIG_SND_SIMPLE_CARD=y
 CONFIG_USB=y
 CONFIG_USB_ANNOUNCE_NEW_DEVICES=y