Fix typo in backup partition offset: `0xfe000` should be `0xfe0000`.
The incorrect offset caused the partition to be mapped at `0x0fe000`
instead of `0xfe0000`, placing it inside the firmware partition range.
Signed-off-by: Fil Dunsky <filipp.dunsky@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/23511
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
700008e9d1