[GFS2] Fix end of multi-line structures

As per Jan Engelhardt's request, I've added a ',' to the end of
each of the multi-line structures which didn't already have
one (most already did).

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --cc fs/gfs2/glops.c
Simple merge

diff --cc fs/gfs2/lops.c
Simple merge

diff --cc fs/gfs2/sys.c
Simple merge