defconfig: Enable DM_SNAPSHOT for Kona target

Enable CONFIG_DM_SNAPSHOT for supporting virtual A/B feature on Kona
target.

Change-Id: I8c9c3eb44e346feee5d0953f8e059392f804089a
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>
diff --git a/arch/arm64/configs/vendor/kona-perf_defconfig b/arch/arm64/configs/vendor/kona-perf_defconfig
index c622396..a224c37 100644
--- a/arch/arm64/configs/vendor/kona-perf_defconfig
+++ b/arch/arm64/configs/vendor/kona-perf_defconfig
@@ -297,6 +297,7 @@
 CONFIG_BLK_DEV_DM=y
 CONFIG_DM_CRYPT=y
 CONFIG_DM_DEFAULT_KEY=y
+CONFIG_DM_SNAPSHOT=y
 CONFIG_DM_UEVENT=y
 CONFIG_DM_VERITY=y
 CONFIG_DM_VERITY_FEC=y
diff --git a/arch/arm64/configs/vendor/kona_defconfig b/arch/arm64/configs/vendor/kona_defconfig
index 083b0b5..bc2a1cd 100644
--- a/arch/arm64/configs/vendor/kona_defconfig
+++ b/arch/arm64/configs/vendor/kona_defconfig
@@ -310,6 +310,7 @@
 CONFIG_BLK_DEV_DM=y
 CONFIG_DM_CRYPT=y
 CONFIG_DM_DEFAULT_KEY=y
+CONFIG_DM_SNAPSHOT=y
 CONFIG_DM_UEVENT=y
 CONFIG_DM_VERITY=y
 CONFIG_DM_VERITY_FEC=y