When attaching a dino bridge, keep the presently enabled I/O mappings (which were set up for us by the PDC), and wait until all devices are attached to clear those noone of our supported devices has claimed.
When attaching a dino bridge, keep the presently enabled I/O mappings
(which were set up for us by the PDC), and wait until all devices are
attached to clear those noone of our supported devices has claimed.

This is necessary for pdc console to work until wsdisplay@sti attaches.

ok mickey@

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