IB/mlx5: Support querying eswitch functions from DEVX

Query eswitch functions returns information of the external host
PF(if it exists). It can be used to check if DEVX is running on ECPF.
Reviewed-by: Erez Shitrit <erezsh@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Bodong Wang <bodong@mellanox.com>
Link: https://lore.kernel.org/r/4265925178ab3224dc1d3e3784bb312d808edca5.1661763785.git.leonro@nvidia.comSigned-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/mlx5/devx.c

@@ -907,6 +907,7 @@ static bool devx_is_whitelist_cmd(void *in)
 	case MLX5_CMD_OP_QUERY_HCA_CAP:
 	case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
 	case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
 		return true;
 	default:
 		return false;
@@ -962,6 +963,7 @@ static bool devx_is_general_cmd(void *in, struct mlx5_ib_dev *dev)
 	case MLX5_CMD_OP_QUERY_CONG_PARAMS:
 	case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
 	case MLX5_CMD_OP_QUERY_LAG:
+	case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
 		return true;
 	default:
 		return false;