Fix code that figures out the PCI bus number for a _PRT configuration object. This should get rid of the "multiple bus 0" problem seen on some machines, and fix PCI interrupt routing on them.
Fix code that figures out the PCI bus number for a _PRT configuration object.
This should get rid of the "multiple bus 0" problem seen on some machines,
and fix PCI interrupt routing on them.

ok marco@ (a while ago)

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