Don't renumber the PCI bus if we don't need to.  Fixes some machines (Dell PowerEdge 2900, 2950) that otherwise lock up at the end of autoconf.
Don't renumber the PCI bus if we don't need to.  Fixes some machines (Dell
PowerEdge 2900, 2950) that otherwise lock up at the end of autoconf.

ok dlg@, marco@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars