!5240 powerpc/lib: Validate size for vector operations

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhu Wang <wangzhu9@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/CL6YVJ2EDJMTD2AZNXSQMP5RGTLEKMXQ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I96G83 
 
Link:https://gitee.com/openeuler/kernel/pulls/5240

 

Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>