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: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/ata/sata_via.c

@@ -211,7 +211,7 @@ static void svia_noop_freeze(struct ata_port *ap)
 	 * certain way.  Leave it alone and just clear pending IRQ.
 	 */
 	ata_chk_status(ap);
-	ap->ops->irq_clear(ap);
+	ata_bmdma_irq_clear(ap);
 }
 
 /**