kirkwood/dockstar: use ubi(kernel, squashfs, ubifs) images

The new image requires `bootz` because of devicetree appending.
To flash a new image boot initramfs:

  tftpboot 0x800000 openwrt-kirkwood-dockstar-initramfs-kernel.bin
  bootz 0x800000

  # detach if already attached
  ubidetach -p /dev/$(grep ubi /proc/mtd|awk -F: '{print $1}')
  # scp openwrt-kirkwood-dockstar-squashfs-factory.bin /tmp
  ubiformat -f /tmp/openwrt-kirkwood-dockstar-squashfs-factory.bin
  # attach is important to resize rootfs_data otherwise it wont boot
  ubiattach -p /dev/$(grep ubi /proc/mtd|awk -F: '{print $1}')

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

SVN-Revision: 49010

target/linux/kirkwood/base-files/lib/upgrade/platform.sh

@@ -14,6 +14,10 @@ platform_check_image() {
 		}
 		return 0
 		;;
+	"dockstar")
+		nand_do_platform_check $board $1
+		return $?
+		;;
 	esac
 
 	echo "Sysupgrade is not yet supported on $board."
@@ -30,3 +34,13 @@ platform_do_upgrade() {
 		;;
 	esac
 }
+
+platform_pre_upgrade() {
+	local board=$(kirkwood_board_name)
+
+	case "$board" in
+	"dockstar")
+		nand_do_upgrade $1
+		;;
+	esac
+}