net/hns3: fix flow rule list in multi-process

net/hns3: fix flow rule list in multi-process

Currently, hns3 driver saves rte_flow list into the
rte_eth_dev.process_private field, it may cause following problem:
The FDIR/RSS rules cannot be managed in a unified manner because
the management structure is not visible between processes.

This patch fixes it by moving rte_flow list to struct hns3_hw which is
visible between processes.

Fixes: fcba820d9b9e ("net/hns3: support flow director")
Fixes: c37ca66f2b27 ("net/hns3: support RSS")
Cc: stable@dpdk.org
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>