6703 update bootadm to support loader configuration (loader project) 6708 update eeprom for loader (loader project) Reviewed by: Richard Lowe <richlowe@richlowe.net> Reviewed by: Patrick Mooney <patrick.mooney@joyent.com> Reviewed by: Alex Wilson <alex.wilson@joyent.com> Approved by: Robert Mustacchi <rm@joyent.com>