mm/compaction: correct comment to complete migration failure

Commit cfccd2e6 ("mm, compaction: finish pageblocks on complete
migration failure") convert cc->order aligned check to page block order
aligned check.  Correct comment relevant with it.

Link: https://lkml.kernel.org/r/20230804110454.2935878-7-shikemeng@huaweicloud.comSigned-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/compaction.c

@@ -2532,7 +2532,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
 			}
 			/*
 			 * If an ASYNC or SYNC_LIGHT fails to migrate a page
-			 * within the current order-aligned block and
+			 * within the pageblock_order-aligned block and
 			 * fast_find_migrateblock may be used then scan the
 			 * remainder of the pageblock. This will mark the
 			 * pageblock "skip" to avoid rescanning in the near