4018 mpt_sas: allow physical topology enumeration in libtopo
4019 mpt_sas: expose LED controls to libtopo
Reviewed by: Keith Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Hans Rosenfeld <hans.rosenfeld@nexenta.com>
Reviewed by: Albert Lee <trisk@nexenta.com>
Approved by: Albert Lee <trisk@nexenta.com>