if the initramfs kernel and payload were flashed in one block, the payload might not be at the start of the ubi partition due to bad blocks inside the kernel partition.
Signed-off-by: John Crispin <blogic@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43513 3c298f89-4303-0410-b956-a3cf2f4a3e73