!8349 perf hist: Fix memory leak of a perf_hpp_fmt

Merge Pull Request from: @ci-robot 
 
PR sync from: Luo Gengkun <luogengkun2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/BI6CSUWFFW2JC7R63BBMDIHDWLQRF33U/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9S273 
 
Link:https://gitee.com/openeuler/kernel/pulls/8349

 

Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Reviewed-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>