[GFS2] Uncomment sprintf_symbol calling code

Now that the patch from -mm has gone upstream, we can uncomment the code
in GFS2 which uses sprintf_symbol.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Robert Peterson <rpeterso@redhat.com>

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