Make MVMEPROM_ARG2() macro take two args in a single asm statement.

Fixes a problem that a wrong address is passed to the MVMEPROM outstr
function (then caused garbages on screen) after we switched

Make MVMEPROM_ARG2() macro take two args in a single asm statement.

Fixes a problem that a wrong address is passed to the MVMEPROM outstr
function (then caused garbages on screen) after we switched to gcc-4.5.
Reported and confirmed by Andrew Gillham on port-mvme68k@:
http://mail-index.NetBSD.org/port-mvme68k/2013/09/17/msg000084.html
http://mail-index.NetBSD.org/port-mvme68k/2013/09/19/msg000085.html
http://mail-index.NetBSD.org/port-mvme68k/2013/09/22/msg000095.html
http://mail-index.NetBSD.org/port-mvme68k/2013/09/22/msg000097.html
No error on "build.sh -m mvme68k build" builds.

Should be pulled up to netbsd-6 branches.

show more ...

Misc cleanup:
- KNF, ANSIfy, remove __P()
- use __func__ to print function names
- use __arraycount()
- include "ioconf.h" for struct cfdriver
- u_intNN_t -> uintNN_t
- wrap long lines
etc.

update for libbug.h, console I/O

libbug from Dale Rahn. Revisions by Theo de Raadt and myself.