arm64: mm: hugetlb: add support for free vmemmap pages of HugeTLB

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I3ZCW9


CVE: NA

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The preparation of supporting freeing vmemmap associated with each
HugeTLB page is ready, so we can support this feature for arm64.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Chen Huang <chenhuang5@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Reviewed-by: Tong Tiangen <tongtiangen@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>