net/mlx5: FPGA, Properly initialize dma direction on fpga conn send

Properly initialize dma direction on fpga conn send.
Do not rely on dma_dir == 0 (DMA_BIDIRECTIONAL).
Signed-off-by: NIlya Lesokhin <ilyal@mellanox.com>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c

@@ -181,6 +181,7 @@ int mlx5_fpga_conn_send(struct mlx5_fpga_conn *conn,
 	if (!conn->qp.active)
 		return -ENOTCONN;
 
+	buf->dma_dir = DMA_TO_DEVICE;
 	err = mlx5_fpga_conn_map_buf(conn, buf);
 	if (err)
 		return err;