freebsd_ata_device::ata_pass_through() implemented

multisector reading and 48bit io are implemented but NOT TESTED.

Especially conversion of smarmontool's format of lba
and FreeBSD's one may not be correct.

It is ad-hoc tested on hardware I have and it work,
but it require more testing

(part of ticket #18)




git-svn-id: https://smartmontools.svn.sourceforge.net/svnroot/smartmontools/trunk@3011 4ea69e1a-61f1-4043-bf83-b5c94c648137