I just changed the serial console selection code to be similar
to the KGDB port selection.
The console device can now be selected with a string
option "CONSDEVNAME": "pc" (default) or
"com0".."com3".
The "com" devices correspond to the standard port
enumeration, don't try to enforce another order in the
configuration file.
"CONSPEED" still selects the speed.
"COMCONSOLE", "CONADDR" and "CONUNIT" are
not valid anymore.
Look at "GENERIC" for an example.

best regards
Matthias Drochner