net: hns: delete redundancy ring enable operations

When network interface is enabled, the ring enable operation is
conducted twice. This patch deletes the redundancy code of ring enable,
and integrates hnae_ae_ops.toggle_queue_status other functions to
hns_ae_start.

Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>