ARM: multi_v7_defconfig: add the Atmel Audio microphone interface PDMIC

Add the Atmel Pulse Density Modulation Interface Controller (PDMIC) driver
as a module. It's used by sama5d2 SoC for instance.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/configs/multi_v7_defconfig

@@ -569,6 +569,7 @@ CONFIG_SND_USB_AUDIO=m
 CONFIG_SND_SOC=m
 CONFIG_SND_ATMEL_SOC=m
 CONFIG_SND_ATMEL_SOC_WM8904=m
+CONFIG_SND_ATMEL_SOC_PDMIC=m
 CONFIG_SND_SOC_FSL_SAI=m
 CONFIG_SND_SOC_ROCKCHIP=m
 CONFIG_SND_SOC_ROCKCHIP_SPDIF=m