sata_promise: kill qc->nsect

Merge order left qc->nsect usage in sata_promise dangling.  Kill it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 551644a..32ae03e 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -502,8 +502,6 @@
 		feature = PDC_FEATURE_ATAPI_PIO;
 		/* set byte counter register to real transfer byte count */
 		nbytes = qc->nbytes;
-		if (!nbytes)
-			nbytes = qc->nsect << 9;
 		if (nbytes > 0xffff)
 			nbytes = 0xffff;
 	} else {