LU-9859 libcfs: cleanup tracefile.h

LU-9859 libcfs: cleanup tracefile.h

With many things moved into tracefile.c we can cleanup a lot of
things in tracefile.h. Move some items that are only used in
tracefile.c from tracefile.h into tracefile.c. In tracefile.h
we have the ifdef LUSTRE_TRACEFILE_PRIVATE which has several
duplicate defines. We can remove those duplicates.

Test-Parameters: trivial

Change-Id: Ic45c4fa6ebfb21e26c536b6ff5cda780a7ca85ac
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Reviewed-on: https://review.whamcloud.com/39116
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>