ata: Never set NULL device name
ata: Never set NULL device name

Probably fixes https://github.com/hughsie/fwupd/issues/1206

hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd