mm/sharepool: clean up ABI breakage

ascend inclusion
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I67NC1


CVE: NA

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Add header file will generates kabi change problem. Clean up by
__GENKSYMS__.

Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>