IB/mlx4: Fix opcode returned in RDMA read completion

Current code has a cut-and-paste error and returns IB_WC_SEND when it
should return IB_WC_RDMA_READ.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 660b27a..8bf44da 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -389,7 +389,7 @@
 			wc->opcode    = IB_WC_SEND;
 			break;
 		case MLX4_OPCODE_RDMA_READ:
-			wc->opcode    = IB_WC_SEND;
+			wc->opcode    = IB_WC_RDMA_READ;
 			wc->byte_len  = be32_to_cpu(cqe->byte_cnt);
 			break;
 		case MLX4_OPCODE_ATOMIC_CS: