mm/page_alloc: move set_page_refcounted() to end of __alloc_pages()

Remove some code duplication by calling set_page_refcounted() at the end
of __alloc_pages() instead of after each call that can allocate a page. 
That means that we free a frozen page if we've exceeded the allowed memcg
memory.

Link: https://lkml.kernel.org/r/20241125210149.2976098-13-willy@infradead.org


Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>