This makes available the additional space,
which was occupied by OEM's jffs2 partition before:
"0x000000f80000-0x000001000000 : jffs2"

Reverting to the OEM firmware will also recover
this partition, i.e. it is not needed and can be
used by OpenWrt.

Signed-off-by: Tamas Balogh <tamasbalogh@hotmail.com>