debos: Sort package list alphabetically
This way it's easier to see whether a package is already included.
debos: Include firmware-brcm80211 to make wifi work
Since version 20230210-2 the firmware-brcm80211 package includes the
needed files to make wifi work on Model B, both 2.4Ghz and 5Ghz.
This MR consists of the following 2 commits: