mm: convert copy_user_huge_page() to copy_user_folio()

mm: convert copy_user_huge_page() to copy_user_folio()

Replace copy_user_huge_page() with copy_user_folio().  copy_user_folio()
does the same as copy_user_huge_page(), but takes in folios instead of
pages.  Convert copy_user_gigantic_page() to take in folios.  Remove
pages_per_huge_page from copy_user_folio(), because we can get that from
folio_nr_pages(dst).

Link: https://lkml.kernel.org/r/20230331093937.945725-6-zhangpeng362@huawei.com
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>