!2765 Remove invalid cpu selection logic in dynamic affinity

Merge Pull Request from: @zhangwei123171 
 
 The CPU selected by  select_task_rq_fair may not be in the corresponding cpuset. 
  This will be corrected in the subsequent fallback process.
    
  dynamic affinity should not break this logic.

https://gitee.com/openeuler/kernel/issues/I8E8DQ 
 
Link:https://gitee.com/openeuler/kernel/pulls/2765

 

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