[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/ops_inode.c b/fs/gfs2/ops_inode.c
index d0f90b88..89417a6 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -839,7 +839,7 @@
 		if (error)
 			goto out_end_trans;
 		ip->i_di.di_ctime = get_seconds();
-		gfs2_trans_add_bh(ip->i_gl, dibh);
+		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 		gfs2_dinode_out(&ip->i_di, dibh->b_data);
 		brelse(dibh);
 	}
@@ -1043,7 +1043,7 @@
 	gfs2_assert_warn(sdp, !error);
 	gfs2_inode_attr_out(ip);
 
-	gfs2_trans_add_bh(ip->i_gl, dibh);
+	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(&ip->i_di, dibh->b_data);
 	brelse(dibh);