!10337 drm/radeon: fix UBSAN warning in kv_dpm.c

Merge Pull Request from: @ci-robot 
 
PR sync from: Kaixiong Yu <yukaixiong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/HLOQNN5H6PE7MPGGI5UMXZORFQAG4LPH/ 
 
https://gitee.com/src-openeuler/kernel/issues/IACR1V 
 
Link:https://gitee.com/openeuler/kernel/pulls/10337

 

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