ascend: mm_struct: introduce new parameter for share pool features

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI


CVE: NA

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The mm->sp_group is mainly used to find out the group which owns the
mm, and the group could use the mm->sp_node to list and find out the
mm, the mm->sp_stat_id is used for collecting memory information.

This changes will affect and destroy the kabi only when enable the
ascend_share_pool config.

Signed-off-by: Tang Yizhou <tangyizhou@huawei.com>
Signed-off-by: Li Ming <limingming.li@huawei.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>