As per PCI specs, disable an adapter's transaction response while sizing its BARs.
As per PCI specs, disable an adapter's transaction response while
sizing its BARs.

tested niallo@, tsi@, ian@, mk@, sturm@, kettenis@, krw@, beck@, drahn@
ok beck@, kettenis@, drahn@

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