Add a quirk to find the AGP bridge on PowerMac7,2 and PowerMac7,3 which is not present in the device-tree.
Add a quirk to find the AGP bridge on PowerMac7,2 and PowerMac7,3 which
is not present in the device-tree.

ok kettenis@

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