defconfig: Enable OverlayFS for SDM670 and SDM845

OverlayFS is needed to be enabled to align with the
latest android base config. Enable it for SDM670 and
SDM845.

Change-Id: Ibf7cb8e75a7858841f9fc0b5ea84c4ec4db666f8
Signed-off-by: Swetha Chikkaboraiah <schikk@codeaurora.org>
diff --git a/arch/arm64/configs/sdm670_defconfig b/arch/arm64/configs/sdm670_defconfig
index 3ff219d..1558f6a 100755
--- a/arch/arm64/configs/sdm670_defconfig
+++ b/arch/arm64/configs/sdm670_defconfig
@@ -618,6 +618,7 @@
 CONFIG_QUOTA_NETLINK_INTERFACE=y
 CONFIG_QFMT_V2=y
 CONFIG_FUSE_FS=y
+CONFIG_OVERLAY_FS=y
 CONFIG_MSDOS_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS_POSIX_ACL=y