Use ATA & SCSI system enumerator to found all ATA & SCSI devices instead

of stealing of device names from /dev. The new method doesn't require
preliminary knowledge about device names.


git-svn-id: https://smartmontools.svn.sourceforge.net/svnroot/smartmontools/trunk@2690 4ea69e1a-61f1-4043-bf83-b5c94c648137