IB/mlx5: Use TIR number based on selector

Use TIR number based on selector, it should be done to differentiate
between RSS QP to RAW one.

Reported-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Tested-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/mlx5_ib.h

@@ -402,6 +402,7 @@ enum mlx5_ib_qp_flags {
 	/* QP uses 1 as its source QP number */
 	MLX5_IB_QP_SQPN_QP1			= 1 << 6,
 	MLX5_IB_QP_CAP_SCATTER_FCS		= 1 << 7,
+	MLX5_IB_QP_RSS				= 1 << 8,
 };
 
 struct mlx5_umr_wr {