mm/hugetlb: replace page_ref_freeze() with folio_ref_freeze() in hugetlb_folio_init_vmemmap()

No functional difference, folio_ref_freeze() is currently a wrapper for
page_ref_freeze().

Link: https://lkml.kernel.org/r/20230926174433.81241-1-sidhartha.kumar@oracle.comSigned-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com> 
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Usama Arif <usama.arif@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/hugetlb.c

@@ -3191,7 +3191,7 @@ static void __init hugetlb_folio_init_vmemmap(struct folio *folio,
 	/* Prepare folio head */
 	__folio_clear_reserved(folio);
 	__folio_set_head(folio);
-	ret = page_ref_freeze(&folio->page, 1);
+	ret = folio_ref_freeze(folio, 1);
 	VM_BUG_ON(!ret);
 	/* Initialize the necessary tail struct pages */
 	hugetlb_folio_init_tail_vmemmap(folio, 1, nr_pages);