block: Rename blk_queue_max_sectors to blk_queue_max_hw_sectors

The block layer calling convention is blk_queue_<limit name>.
blk_queue_max_sectors predates this practice, leading to some confusion.
Rename the function to appropriately reflect that its intended use is to
set max_hw_sectors.

Also introduce a temporary wrapper for backwards compability.  This can
be removed after the merge window is closed.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

drivers/md/raid10.c

@@ -1161,7 +1161,7 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
 			 */
 			if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
 			    queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
-				blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
+				blk_queue_max_hw_sectors(mddev->queue, PAGE_SIZE>>9);
 
 			p->head_position = 0;
 			rdev->raid_disk = mirror;
@@ -2260,7 +2260,7 @@ static int run(mddev_t *mddev)
 		 */
 		if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
 		    queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
-			blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
+			blk_queue_max_hw_sectors(mddev->queue, PAGE_SIZE>>9);
 
 		disk->head_position = 0;
 	}