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: NMuchun Song <songmuchun@bytedance.com>
Signed-off-by: NChen Huang <chenhuang5@huawei.com>
Signed-off-by: NNanyong Sun <sunnanyong@huawei.com>
Reviewed-by: NTong Tiangen <tongtiangen@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

fs/Kconfig

@@ -238,7 +238,7 @@ config HUGETLB_PAGE
 
 config HUGETLB_PAGE_FREE_VMEMMAP
 	def_bool HUGETLB_PAGE
-	depends on X86_64
+	depends on X86_64 || ARM64
 	depends on SPARSEMEM_VMEMMAP
 
 config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON