pata_artop: typo

Fix a typo (this was in the original patch but was not merged when the code
fixes were for some reason)
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

block/blk-settings.c

@@ -431,7 +431,7 @@ EXPORT_SYMBOL(blk_queue_segment_boundary);
  *
  * description:
  *    set required memory and length alignment for direct dma transactions.
- *    this is used when buiding direct io requests for the queue.
+ *    this is used when building direct io requests for the queue.
  *
  **/
 void blk_queue_dma_alignment(struct request_queue *q, int mask)