migrate to common m68k/pmap_motorola.c

Hi,

Recently NetBSD/amiga has finally been switched to using
common m68k pmap_motorola.c rather than its own amiga/pmap.c:
http://mail-index.NetBSD.org/source-changes/2009/09/14/msg000885.html

I'd also like to switch NetBSD/atari to using the common pmap_motorola.c
(so that we no longer have to pull changes from MI pmap as we did recently),
but I'd call for testers before commiting the change and
I've put -current kernels with the common pmap_motorola.c here:
ftp://ftp.NetBSD.org/pub/NetBSD/misc/tsutsui/atari-pmap_motorola/

-rw-rw-r--  1 1201  netbsd  1316971 Oct 10 15:04 netbsd-ATARITT.gz
-rw-rw-r--  1 1201  netbsd  1374937 Oct 10 15:04 netbsd-FALCON.gz
-rw-rw-r--  1 1201  netbsd  1474563 Oct 10 15:04 netbsd-HADES.gz
-rw-rw-r--  1 1201  netbsd  1440256 Oct 10 15:04 netbsd-MILAN-ISAIDE.gz
-rw-rw-r--  1 1201  netbsd  1475598 Oct 10 15:05 netbsd-MILAN-PCIIDE.gz
-rw-rw-r--  1 1201  netbsd   702479 Oct 10 15:05 netbsd-SMALL030.gz

Both local and common pmaps should also have the same functions and
there should be no visible differences, but if you see any problem
on your machines please let me know.

Thanks,

---
Izumi Tsutsui