psi: make kabi compatibility for psi in struct cgroup

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I562O9


CVE: NA
backport: openEuler-22.03-LTS

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The cgroup structures are all allocated by the core kernel
code at run time. It is also accessed only the cgroup core code
and so changes made to the cgroup structure should not affect
third-party kernel modules. However, a number of important kernel
data structures do contain pointer to a cgroup structure and so
the kABI signature has to be maintained.

Signed-off-by: Chen Wandun <chenwandun@huawei.com>
Reviewed-by: zhangjialin 00591957 <zhangjialin11@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>