IB/mlx4: Replace printk(KERN_yyy...) with pr_yyy(...)

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>

[ Replace one more printk_once() with pr_info_once().  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index dca55b1..bbaf617 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -338,7 +338,7 @@
 
 	err = mlx4_SYNC_TPT(mdev);
 	if (err)
-		printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
+		pr_warn("SYNC_TPT error %d when "
 		       "unmapping FMRs\n", err);
 
 	return 0;