share_pool: Use node_id from spa when alloc share_pool memory

ascend inclusion
category: Feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4NDAW


CVE: NA

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We store the preferred node_id in sp_area in sp_alloc() and use it for
memory alloc in shmem_fault.

Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>
Signed-off-by: Peng Wu <wupeng58@huawei.com>
Reviewed-by: Kefeng <Wang&lt;wangkefeng.wang@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>