!5152 arm64/mpam: Remove warning about no msc corresponding to the online cpu

Merge Pull Request from: @ci-robot 
 
PR sync from: Zeng Heng <zengheng4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/KY3OOUJWEDGEPZ5S7B6TVUYM3I5VNOW3/ 
 
https://gitee.com/openeuler/kernel/issues/I96YK9 
 
Link:https://gitee.com/openeuler/kernel/pulls/5152

 

Reviewed-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>