net: hns3: some functions can be static.

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

Functions is used only in the declared file.
So we need to add a keyword static for them to Reduce coupling.
Those functions inclding as below:
hclge_func_reset_sync_vf().

This patch as a supplement to patch 26380194.
Fix tag: 26380194 (" some functions can be static ")

Feature or Bugfix:Bugfix

Signed-off-by: liaoguojia <liaoguojia@huawei.com>
Reviewed-by: lipeng <lipeng321@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>