[XFS] mutex fallout - fix debug builds and remove no-longer-useful comment.

Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index 7dcdd06..3384bfe 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -167,7 +167,7 @@
 	xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
 	xqm->qm_nrefs = 0;
 #ifdef DEBUG
-	xfs_mutex_init(&qcheck_lock, MUTEX_DEFAULT, "qchk");
+	mutex_init(&qcheck_lock);
 #endif
 	return xqm;
 }