The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.
Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix
As per the updated FreeBSD copyright template. These were unambiguous
cases where the Foundation was the only listed copyright holder.
Sponsored by: The FreeBSD Foundation