This involves converting migrate_huge_page_move_mapping().  We also need a
folio variant of hugetlb_set_page_subpool(), but that's for a later patch.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: NMuchun Song <songmuchun@bytedance.com>
Reviewed-by: NMike Kravetz <mike.kravetz@oracle.com>