8014 loader: remove NFSv2 reader code
Reviewed by: Marcel Telka <marcel@telka.sk>
Approved by: Gordon Ross <gordon.w.ross@gmail.com>

5061 freebsd boot loader integration (loader project)
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Cody Mello <melloc@joyent.com>
Approved by: Robert Mustacchi <rm@joyent.com>