- For prevent confuse about what BSD license variant we used, 2- or 3-clause license, we change the license to FreeBSD license to make it unambiguously refers to the 2-clause license.
Contributor list: - Andrew Waterman <andrew@sifive.com> - Palmer Dabbelt <palmer@dabbelt.com> - Kito Cheng <kito.cheng@gmail.com> - Scott Beamer <sbeamer@eecs.berkeley.edu>