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>
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 901eaf5..6a62ebb 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -569,6 +569,7 @@
 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