!6560 IB/hfi1: Fix a memleak in init_credit_return

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhenzeng Su <suzhenzeng@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/D5CY3R4M5PRBB6BPD4MSCOEUAOD4J3EH/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9HJPD 
 
Link:https://gitee.com/openeuler/kernel/pulls/6560

 

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