!6940 drm: nv04: Fix out of bounds access

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhang Changzhong <zhangchangzhong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/TJIJD5VN2HI2OHAVJSDAJDJB5RPN34OA/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9L5JU 
 
Link:https://gitee.com/openeuler/kernel/pulls/6940

 

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