bhyve currently reports each of "smbios.system.maker" and
"smbios.system.family" as " ".
This presents challenges for both humans and tools when trying to parse output
that uses those results.
The new values reported are now:
smbios.system.family="Virtual Machine"
smbios.system.maker="FreeBSD"

PR: 250728
Approved by: grehan@FreeBSD.org
Sponsored by: Netflix