Despite being discouraged in the man page people are trying to load
the driver from loader. In that case firmware is missing and the
root file system is not there yet and the LinuxKPI based drivers
will panic the system on boot. Simply avoid any further support
trouble by disallowing them to be loaded from loader.
If someone still wants to do it, they will need to figure out how
to remove them from the blacklst and how to loader the firmware
file(s) in advance themselves.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
PR: 287480