- initialize interrupt string to NULL. - remove bogus 32-bit memory type flag when mapping I/O space.
- initialize interrupt string to NULL.
- remove bogus 32-bit memory type flag when mapping I/O space.

ok deraadt@

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