net: hns3: schedule hclgevf_service by using delayed workqueue

Currently, a timer is defined to schedule hclgevf_service per
second. To simplify the code, this patch uses the delayed work
instead of timer to schedule hclgevf_serive.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>