kabi: mm: reserve space for memory subsystem related

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4JWSP


CVE: NA

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Reserve space for the structure in memory subsystem.

Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>