test patch for removing cf_unit abuse

[Chuck Silvers <chuq%chuq.com@localhost>]

hi,

I've been working on eliminating the "abuse of cf_unit" stuff,
and I've put a diff for the amiga parts of this at

        ftp://ftp.netbsd.org/pub/NetBSD/misc/chs/cfunit/diff.amiga

could someone try this out for me and let me know if it causes any problems?

the nature of the changes is that instead of using a 32-bit global variable
to record which ite unit numbers have been configured, we just use a flag
in the softc.

-Chuck