Sync console handling with hppa port:
Sync console handling with hppa port:

Delay switching to the real serial console until we attach the serial device.
The variety of different serial devices is just too big to make a decision up
front.  This should make the second serial port on four-digit B/C/J-class
workstation work as a serial console too.

Last bit isn't true yet; the code to support com @ ssio isn't there yet on
hppa64.

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