mm/sharepool: Implement mg_sp_config_dvpp_range()

ascend inclusion
category: Feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8LNGH



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This is used to config the virtual address range fo SP_DVPP flagged
allocation. This is used for some special hardware that can only
access limited address range.

Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>