net/mlx5: fs, call the deletion function of the node

Don't call del_hw_fte() directly, instead use the hardware deletion
function set. This is just a small cleanup and doesn't change anything
as for an FTE the deletion function is already set to del_hw_fte().
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

@@ -2085,7 +2085,7 @@ void mlx5_del_flow_rules(struct mlx5_flow_handle *handle)
 	for (i = handle->num_rules - 1; i >= 0; i--)
 		tree_remove_node(&handle->rule[i]->node, true);
 	if (list_empty(&fte->node.children)) {
-		del_hw_fte(&fte->node);
+		fte->node.del_hw_func(&fte->node);
 		/* Avoid double call to del_hw_fte */
 		fte->node.del_hw_func = NULL;
 		up_write_ref_node(&fte->node, false);