!2829 Modify idle cpu judgment in dynamic affinity

Merge Pull Request from: @zhangwei123171 
 
 In a co-location scenario, when an online container use the dynamic affinity capability, 
the CPU that is full of offline tasks will also be used as an idle CPU, which is more friendly to online tasks.
 
 
Link:https://gitee.com/openeuler/kernel/pulls/2829

 

Reviewed-by: Zucheng Zheng <zhengzucheng@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>