lspci: Retrieve prog if, subsystem ids and revision id via libpci

lspci: Retrieve prog if, subsystem ids and revision id via libpci

Use pci_fill_info with CLASS_EXT and SUBSYS to fill this information.

lspci in some places reads class from what libpci provider fills in
dev->device_class and in some other places it reads directly from config
space. In dev->device_class is stored class possible different class as in
config space (e.g. if kernel is fixing class because device has bogus
information stored in config space).

With this change is class always read from dev->device_class which reflects
and respects lspci -b option (Bus-centric view). Same applies for subsystem
ids and revision id (note that prog if is part of class).