block: Add BLK_ prefix to definitions

Add a BLK_ prefix to block layer constants.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index 1fb6c31..a7ecb43 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -753,8 +753,8 @@
 	blk_queue_make_request(queue, ps3vram_make_request);
 	blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
 	blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
-	blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE);
-	blk_queue_max_sectors(queue, SAFE_MAX_SECTORS);
+	blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
+	blk_queue_max_sectors(queue, BLK_SAFE_MAX_SECTORS);
 
 	gendisk = alloc_disk(1);
 	if (!gendisk) {