Migrate AVM FRITZ!Box 7360 v2 boards flashed with the incorrect v1 image to use
the newly added v2 target image during the next upgrade.
Using the v2 target image allows the boards to read the TFFS partition, which
is misaligned when using the v1 image.

Co-authored-by: Jan-Niklas Burfeind <git@aiyionpri.me>