net/hns3: support flow action of queue region

net/hns3: support flow action of queue region

Kunpeng 930 hardware support spread packets to region of queues which can
be configured by FDIR rule, it means user can create one FDIR rule which
action is one region of queues, and then RSS use the region info to spread
packets.

As we know, RTE_FLOW_ACTION_TYPE_RSS is used to spread packets among
several queues, user could config such as func/level/types/key/queue
parameter to control RSS function, so we provide this feature under the
RTE_FLOW_ACTION_TYPE_RSS framework.

Consider RSS input tuple don't have eth header, we use the following
rule to distinguish them (whether it's queue region configuration or
rss general configuration):
Case 1: pattern have ETH and action's queue_num > 0, indicate it is
queue region configuration.
Case other: rss general configuration.

So if user want to configure one flow which ipv4=192.168.1.192 spread to
queue region of queue 0/1/2/3, the patter should:
  RTE_FLOW_ITEM_TYPE_ETH with spec=last=mask=NULL
  RTE_FLOW_ITEM_TYPE_IPV4 with spec=192.168.1.192 last=mask=NULL
  RTE_FLOW_ITEM_TYPE_END
the action should:
  RTE_FLOW_ACTION_TYPE_RSS with queue_num=4 queue=0/1/2/3
  RTE_FLOW_ACTION_TYPE_END
after calling rte_flow_create, one FDIR rule will be created.

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>