Fix flashing the 8bitdo SF30
Fix flashing the 8bitdo SF30

We have to check for the SUPPORTED flag _after_ the FuDeviceList has added the
missing GUIDs from the device when it was in runtime mode.

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