trivial: dell: turn device back on for thunderbolt plugin, not tbtfwu plugin
trivial: dell: turn device back on for thunderbolt plugin, not tbtfwu plugin

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