net: hns3: add one parameter for function hns3_nic_maybe_stop_tx()

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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Function hns3_nic_net_xmit() and functioin hns3_nic_maybe_stop_tx() both
get ring pointer from priv->ring[]. According to opinion of community to
reduce this kind of operation, this patch adds parameter ring for function
hns3_nic_maybe_stop_tx().

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: shenhao <shenhao21@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>