!7194 s390/dasd: fix double module refcount decrement

Merge Pull Request from: @ci-robot 
 
PR sync from: Chen Zhongjin <chenzhongjin@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/JZERKEEUP47HBUGJEYBFXH3CO6R5FRSV/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9L9NF 
 
Link:https://gitee.com/openeuler/kernel/pulls/7194

 

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