Change the copyright notice to a standard BSD 2-clause license and assign

Change the copyright notice to a standard BSD 2-clause license and assign
ownership to the FreeBSD foundation for the years this file has been in
the FreeBSD repository.

This file was originally created by Juniper as part of upgrading to FreeBSD
4.10 (which had no MIPS support) and held functions found on other machines
It grew actual functionality over time. The functionaliy was copied from
other architectures and ported to MIPS on a as-needed basis.

Approved by:	Mark Baushke (Juniper IP)
Approved by:	Megan Sugiyama (Juniper legal)
Pointed out by:	jmallett@
Requested by:	core (jhb@)