mm/sharepool: Share pool statistics adaption

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5EORS


CVE: NA

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The management of the address space is adjusted, and the statistical
data processing of the shared pool needs to be adapted.

Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Signed-off-by: Zhang Jian <zhangjian210@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>