fix typo "insted" -> "instead"

Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/block/elevator.c b/block/elevator.c
index 952aee0..446aea2 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -390,7 +390,7 @@
 
 /*
  * Insert rq into dispatch queue of q.  Queue lock must be held on
- * entry.  rq is sort insted into the dispatch queue. To be used by
+ * entry.  rq is sort instead into the dispatch queue. To be used by
  * specific elevators.
  */
 void elv_dispatch_sort(struct request_queue *q, struct request *rq)