net/mlx5: split meter color policy handling

net/mlx5: split meter color policy handling

If the fate action is either RSS or Queue of a meter policy, the
action will only be created in the flow splitting stage. With queue
as the fate action, only one sub-policy is needed. And RSS will
have more than one sub-policies if there is an expansion.

Since the RSS parameters are the same for both green and yellow
colors except the queues, the expansion result will be unique.
Even if only one color has the RSS action, the checking and possible
expansion will be done then. For each sub-policy, the action rules
need to be created separately on its own policy table.

Signed-off-by: Bing Zhao <bingz@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>