and PCI_IOC_DRVNAMEONBUS. the new ones also take a (autoconf) PCI bus
number, which allows lookups for any device on any pci bus node. use this
in pcictl which current reports the wrong values sometimes.
up next: use these in libpciaccess.
via PCI_IOC_DRVNAME.
update manual and set lists (and remove a couple of doubled entries.)o
this will be used in libpciaccess() to implement the has_kernel_driver()
method.