MFC: kobj functionality

this does not change the general driver interface or affect any system other
than altering the build process slightly.

the process of generating .c and .h files from .m files is changed by the
introduction of makeops.pl which simply determines if it is being run on a
device interface .m file or a kobj .m file and calls makedevops.pl or
makeobjops.pl as appropriate. the determination is done by checking for the
presence of 'KOBJ' in the first line of the file- this should be in a
comment.

Approved by: dfr (in principle), -arch