Fix naming convientions for HW-related packages
Most of the HW-related packages are named in <board_name>-<feature>
fashion, like
mox-support
omnia-rainbow
turris1x-btrfs
We should hold that convention and so rename following packages:
-
rescue-mode-omnia
→omnia-rescue-mode
-
u-boot-omnia
→omnia-u-boot