!3459 reset idlest_cpu if not meet the conditions for preferred CPU

Merge Pull Request from: @zhangwei123171 
 
We have set the preferred CPU, but when the load is too high,  the conditions for the preferred CPU are not met. At this time, the idle CPU needs to be reset.
    
This will be corrected in the subsequent fallback process.  dynamic affinity should not break this logic. 
 
Link:https://gitee.com/openeuler/kernel/pulls/3459

 

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