thunderbolt: Don't show safe mode errors for USB4 host controllers
thunderbolt: Don't show safe mode errors for USB4 host controllers

USB4 Controllers were showing up like this:

USB4 Controller:
     Device ID:           3df660bc4bdb67fd6fc101b34c6fd8cd235e3f97
     Summary:             Unmatched performance for high-speed I/O
     Current version:     00.00
     Update Error:        Device is in safe mode
     GUID:                4d86f168-e1cc-5995-afd3-ae9df6a14f5e -> TBT-safemode
     Device Flags:         Internal device
                           Requires AC power

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