Use AFS_PROC consistently

Use AFS_PROC consistently

Make consistent use of AFS_PROC in portable and mixed files, adding the define
for platforms which lacked it.  This completes a change that has been ongoing
for several years.

LICENSE BSD

Reviewed-on: http://gerrit.openafs.org/642
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Tested-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Reviewed-by: Derrick Brashear <shadow@dementia.org>