- fix error message printed when pci_mapreg_map() fails. - initialize error to 0 in pcn_ioctl().
- fix error message printed when pci_mapreg_map() fails.
- initialize error to 0 in pcn_ioctl().

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