dfu: Ensure the progress callbacks are connected for all devices
dfu: Ensure the progress callbacks are connected for all devices

This ensures the device always reports the correct status always (but just once)
to the client.

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