!7944 v2 netrom: Fix a data-race around sysctl_netrom_transport_maximum_tries

Merge Pull Request from: @ci-robot 
 
PR sync from: Xiongfeng Wang <wangxiongfeng2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/LRCLBGNUXUKWEQR3NLH7776EPB6UA32F/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9Q94J 
 
Link:https://gitee.com/openeuler/kernel/pulls/7944

 

Reviewed-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>