RDMA/mlx5: Support 400Gbps IB rate in mlx5 driver

Support 400Gbps IB rate in mlx5 driver.

Link: https://lore.kernel.org/r/20210209130429.698237-1-leon@kernel.org
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mlx5/qp.c

@@ -3069,6 +3069,8 @@ static int ib_to_mlx5_rate_map(u8 rate)
 		return 4;
 	case IB_RATE_50_GBPS:
 		return 5;
+	case IB_RATE_400_GBPS:
+		return 6;
 	default:
 		return rate + MLX5_STAT_RATE_OFFSET;
 	}