[GFS2] tidy up error message

Print error with log_error() to be consistent with others.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
index ab30102..f2efff4 100644
--- a/fs/gfs2/locking/dlm/mount.c
+++ b/fs/gfs2/locking/dlm/mount.c
@@ -68,8 +68,7 @@
 	strncpy(data, data_arg, 255);
 
 	if (!strlen(data)) {
-		printk(KERN_ERR
-		       "DLM/GFS2/GFS ERROR: (u)mount helpers are not installed!\n");
+		log_error("no mount options, (u)mount helpers not installed");
 		return -EINVAL;
 	}