arm64: mm: re-enable OPTIMIZE_HUGETLB_VMEMMAP

Now update of vmemmap page table can follow the rule of break-before-make
safely for arm64 architecture, re-enable HVO on arm64.

Link: https://lkml.kernel.org/r/20240113094436.2506396-4-sunnanyong@huawei.com


Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>