[GFS2] Add an additional argument to gfs2_trans_add_bh()

This adds an extra argument to gfs2_trans_add_bh() to indicate whether the
bh being added to the transaction is metadata or data. Its currently unused
since all existing callers set it to 1 (metadata) but following patches will
make use of it.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index a0320f2..5fb5a53 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -527,7 +527,7 @@
 	int64_t x;
 
 	down(&sdp->sd_quota_mutex);
-	gfs2_trans_add_bh(ip->i_gl, qd->qd_bh);
+	gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1);
 
 	if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
 		qc->qc_change = 0;