sata_via: style clean up, no indirect method call in LLD

Call ata_bmdma_irq_clear() directly instead of through
ap->ops->irq_clear() according to libata style guideline.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 55b0123..d3d5c0d 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -211,7 +211,7 @@
 	 * certain way.  Leave it alone and just clear pending IRQ.
 	 */
 	ata_chk_status(ap);
-	ap->ops->irq_clear(ap);
+	ata_bmdma_irq_clear(ap);
 }
 
 /**