thunderbolt: ignore useless thunderbolt device types
thunderbolt: ignore useless thunderbolt device types

Kernel 4.15 adds support for Thunderbolt P2P devices via
CONFIG_THUNDERBOLT_NET.  When turned on and activated fwupd will
show an empty device representing the IP connection between machines.

These device types aren't useful in fwupd and should be filtered.

Suggested-by: Mika Westerberg <afb75201fb002d7fdd2b0b231e006999e00db8a9@intel.com>
Signed-off-by: Mario Limonciello <3f0fe7ef7a1360c182d345338042daf40343329b@dell.com>

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