sched/fair: Modify idle cpu judgment in dynamic affinity

jingdong inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8PGQ3



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In a co-location scenario, when an online container uses
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.

Fixes: f6cee1481527 ("sched: Adjust wakeup cpu range according CPU util dynamicly")
Signed-off-by: zhangwei123171 <zhangwei123171@jd.com>
Signed-off-by: Hui Tang <tanghui20@huawei.com>