net: hns3: delete unnecessary judgement in hns3_get_stats()

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

This patch deletes unnecessary INITED state judgement in hns3_get_stats()
function.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>