port-powerpc/38307: powerpc has MD ddb commands w/o help

[martin%duskware.de@localhost]

>Number:         38307
>Category:       port-powerpc
>Synopsis:       powerpc has MD ddb commands w/o help
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    port-powerpc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 26 10:35:01 +0000 2008
>Originator:     Martin Husemann
>Release:        NetBSD 4.99.58
>Organization:
The NetBSD Foundation
>Environment:
System: NetBSD sunny-weather.duskware.de 4.99.58 NetBSD 4.99.58 (SUNNY) #74: 
Tue Mar 25 13:49:05 CET 2008 
martin%night-porter.duskware.de@localhost:/usr/src/sys/arch/sparc64/compile/SUNNY
 sparc64
Architecture: sparc64
Machine: sparc64
>Description:

powerpc has "mach" ddb commands that have no help for options DDB_VERBOSE_HELP.

>How-To-Repeat:
code inspection

>Fix:
Help is very easy to add once you know what the "mach" commands actually do.
Examples can be found in sparc64 or sh3 db_interface.c. While checking these
commands, please also verify the ddb(4) manual page is correct.