Check a PCI device's class, subclass, and progif to figure out if it is
a USB4 NHI. nhi_identifiers is completely removed as only these generic
USB4 NHIs are supported anyway.
Also, remove MODULE_PNP_INFO() for now. Will add this back once
thunderbolt driver is fully functional and tested.
PR: 290827
Sponsored by: The FreeBSD Foundation