thunderbolt: Don't remove devices on change events
thunderbolt: Don't remove devices on change events

Based on a patch by Mario Limonciello, many thanks.

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