net/mlx5: fix domains detection in meter hierarchy

net/mlx5: fix domains detection in meter hierarchy

Meters in one hierarchy might support different domains. For
example, one meter may support ingress only, but the root meter
can support all the domains.

If the later meter in the meter hierarchy wrongly doesn't inherit
the first meter's domains, it will lead to invalid domain table
access.

Fix is when creating meter hierarchy, try to inherit the first meter
domains in the meter hierarchy.

Fixes: a3b7af90baba ("net/mlx5: validate meter action in policy")
Cc: stable@dpdk.org
Signed-off-by: Shun Hao <shunh@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>