PCI_VENDOR_ID_VMWARE not in pci_ids.h

[Francesco Ruggeri]

PCI_VENDOR_ID_VMWARE is not in pci_ids.h, but it is instead defined
in device specific files.
It can be useful to always have access to it, especially when accessing
subsystem_vendor_id on emulated devices.
Is there a reason to keep it out of pci_defs.h?
Any objections to moving it there?

Thanks,
Francesco Ruggeri