sched: programmable: Add three hooks in select_task_rq_fair()

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5KUFB


CVE: NA

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Add three hooks of sched type in select_task_rq_fair(), as follows:
'cfs_select_rq'
	Replace the original core selection policy or
	implement dynamic CPU affinity.

'cfs_select_rq_exit'
	Restoring the CPU affinity of the task before exiting of
	'select_task_rq_fair'.

	To be used with 'cfs_select_rq' hook to implement
	dynamic CPU affinity.

'cfs_wake_affine'
	Determine on which CPU task can run soonest. Allow user to
	implement deferent policies.

Signed-off-by: Chen Hui <judy.chenhui@huawei.com>
Signed-off-by: Hui Tang <tanghui20@huawei.com>