mm: fix typos and grammar error in comments

We moves tha -> We move that in mm/swap.c
statments -> statements in include/linux/mm.h

Link: https://lkml.kernel.org/r/20210509063444.GA24745@hyeyoo
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/swap.c b/mm/swap.c
index 6c11db7..1960043 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -554,7 +554,7 @@ static void lru_deactivate_file_fn(struct page *page, struct lruvec *lruvec)
 	} else {
 		/*
 		 * The page's writeback ends up during pagevec
-		 * We moves tha page into tail of inactive.
+		 * We move that page into tail of inactive.
 		 */
 		add_page_to_lru_list_tail(page, lruvec);
 		__count_vm_events(PGROTATED, nr_pages);