sched: Add static key to reduce noise

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7A718



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Add static key to reduce noise when not enable dynamic affinity.
There are better performance in some case, such for lmbench.

Fixes: 243865da ("cpuset: Introduce new interface for scheduler ...")
Signed-off-by: Hui Tang <tanghui20@huawei.com>
Reviewed-by: Zhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>