mm: mlock: use folios_put() in mlock_folio_batch()

Since we have updated mlock to use folios, it's better to call
folios_put() instead of calling release_pages() directly.

Link: https://lkml.kernel.org/r/20230405161854.6931-2-zhengqi.arch@bytedance.com


Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>