net: hns3: solve the unlock 2 times when rocee init fault

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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When rocee init fault, the rtnl_unlock execute 2 times

Signed-off-by: Hao Shen <shenhao21@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>