!4580 printk: fix double unlock issue in logbuf_lock

Merge Pull Request from: @ci-robot 
 
PR sync from: Ye Weihua <yeweihua4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/AYOOJYDLPP4CK2JAJNSTRG45XGF6QBQM/ 
 
https://gitee.com/openeuler/kernel/issues/I91SQA 
 
Link:https://gitee.com/openeuler/kernel/pulls/4580

 

Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>