net/mlx5: prepare meter flow tables

net/mlx5: prepare meter flow tables

This commit prepare the meter table and suffix table.

A flow with meter will be split to three flows. The three flows are
created on differnet tables. The packets transfer between the flows
on the tables as below:

Prefix flow -> Meter flow -> Suffix flow

Prefix flow does the user defined match and the meter action. The meter
action colors the packet and set its destination to meter table to be
processed by the meter flow.
The meter flow judges if the packet can be passed or not. If packet can
be passed, it will be transferred to the suffix table.
The suffix flow on the suffix table will apply the left user defined
actions to the packet.

The ingress egress and transfer all have the independent meter and
suffix tables.

Signed-off-by: Suanming Mou <suanmingm@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>