mediatek: expand kernel size to 6MiB for WSR-2533DHP2

Expand kernel partition size on WSR-2533DHP2 for the kernel larger than
4 MiB.
To prevent upgrading from old firmware before this commit, bump the
compat version to 1.1 and add a message for forced sysupgrade using
factory-uboot.bin image.

Signed-off-by: INAGAKI Hiroshi <[email protected]>

target/linux/mediatek/image/mt7622.mk

@@ -101,7 +101,7 @@ define Device/buffalo_wsr-2533dhp2
   DEVICE_DTS := mt7622-buffalo-wsr-2533dhp2
   DEVICE_DTS_DIR := ../dts
   IMAGE_SIZE := 59392k
-  KERNEL_SIZE := 4096k
+  KERNEL_SIZE := 6144k
   BLOCKSIZE := 128k
   PAGESIZE := 2048
   SUBPAGESIZE := 512
@@ -123,6 +123,10 @@ define Device/buffalo_wsr-2533dhp2
 	buffalo-trx 0x32504844 $(KDIR)/tmp/$$(DEVICE_NAME).null | \
 	sysupgrade-tar kernel=$$$$@ | append-metadata
   DEVICE_PACKAGES := kmod-mt7615-firmware swconfig
+  DEVICE_COMPAT_VERSION := 1.1
+  DEVICE_COMPAT_MESSAGE := Partition table has been changed due to kernel size restrictions. \
+	Please upgrade via sysupgrade with factory-uboot.bin image and '-F' option. \
+	(Warning: your configurations will be erased!)
 endef
 TARGET_DEVICES += buffalo_wsr-2533dhp2
 

target/linux/mediatek/mt7622/base-files/etc/uci-defaults/05_fix-compat-version

@@ -1,7 +1,8 @@
 . /lib/functions.sh
 
 case "$(board_name)" in
-	bananapi,bpi-r64)
+	bananapi,bpi-r64|\
+	buffalo,wsr-2533dhp2)
 	uci set system.@system[0].compat_version="1.1"
 	uci commit system
 	;;