block: Consolidate phys_segment and hw_segment limits

Except for SCSI no device drivers distinguish between physical and
hardware segment limits.  Consolidate the two into a single segment
limit.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index b1dfd23..cc435be 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -616,8 +616,7 @@
 	gendisk->first_minor = deviceno;
 	strncpy(gendisk->disk_name, c->name,
 			sizeof(gendisk->disk_name));
-	blk_queue_max_hw_segments(q, 1);
-	blk_queue_max_phys_segments(q, 1);
+	blk_queue_max_segments(q, 1);
 	blk_queue_max_hw_sectors(q, 4096 / 512);
 	gendisk->queue = q;
 	gendisk->fops = &viocd_fops;