Move from using devclass_find_free_unit(ata_devclass, 0) to -1 for the unit number.  Basically they are the same...
Move from using devclass_find_free_unit(ata_devclass, 0) to -1 for the
unit number.  Basically they are the same...

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase