trivial: Add the missing device flag to string functionality
trivial: Add the missing device flag to string functionality

hughsie/fwupd,vathpela/fwupd,vathpela/fwupd,fwupd/fwupd,vathpela/fwupd,hughsie/fwupd,superm1/fwupd,hughsie/fwupd,superm1/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,superm1/fwupd,fwupd/fwupd,vathpela/fwupd