net/hns3: fix use of command status enumeration

net/hns3: fix use of command status enumeration

The type of return value of hns3_cmd_send is int, some function declare
the return value as hns3_cmd_status.

This patch fix the incorrect use of the enum hns3_cmd_status.

Fixes: 737f30e1c3ab ("net/hns3: support command interface with firmware")
Fixes: 02a7b55657b2 ("net/hns3: support Rx interrupt")
Cc: stable@dpdk.org
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>