ipq807x: xiaomi: set compat version for single rootfs

Xiaomi devices were migrated to a single rootfs layout, so we must set the
major compat version to 2 in order to prevent sysupgrading which brick any
devices that have not been migrated.

Signed-off-by: Robert Marko <robimarko@gmail.com>

target/linux/ipq807x/base-files/etc/board.d/05_compat-version

@@ -8,6 +8,11 @@
 board_config_update
 
 case "$(board_name)" in
+	redmi,ax6|\
+	xiaomi,ax3600|\
+	xiaomi,ax9000)
+		ucidef_set_compat_version "2.0"
+		;;
 	*)
 		ucidef_set_compat_version "1.1"
 		;;

target/linux/ipq807x/image/generic.mk

@@ -22,6 +22,13 @@ define Device/IfnameMigration
 	DEVICE_COMPAT_MESSAGE := Network interface names have changed
 endef
 
+define Device/partition-layout-migration
+  DEVICE_COMPAT_VERSION := 2.0
+  DEVICE_COMPAT_MESSAGE := *** Partition layout has changed from earlier \
+	versions. You need to reinstall the firmware from UART or a migration \
+	initramfs image. Settings will be lost. ***
+endef
+
 define Device/dynalink_dl-wrx36
 	$(call Device/FitImage)
 	$(call Device/UbiFit)
@@ -92,7 +99,7 @@ TARGET_DEVICES += redmi_ax6
 define Device/xiaomi_ax3600
 	$(call Device/FitImage)
 	$(call Device/UbiFit)
-	$(call Device/IfnameMigration)
+	$(call Device/partition-layout-migration)
 	DEVICE_VENDOR := Xiaomi
 	DEVICE_MODEL := AX3600
 	BLOCKSIZE := 128k
@@ -111,7 +118,7 @@ TARGET_DEVICES += xiaomi_ax3600
 define Device/xiaomi_ax9000
 	$(call Device/FitImage)
 	$(call Device/UbiFit)
-	$(call Device/IfnameMigration)
+	$(call Device/partition-layout-migration)
 	DEVICE_VENDOR := Xiaomi
 	DEVICE_MODEL := AX9000
 	BLOCKSIZE := 128k