mlx5hws_bwc_rule_alloc
bwc_rule = mlx5hws_bwc_rule_alloc(bwc_matcher);
struct mlx5hws_bwc_rule *mlx5hws_bwc_rule_alloc(struct mlx5hws_bwc_matcher *bwc_matcher);
subrule = mlx5hws_bwc_rule_alloc(subm->bwc_matcher);