[libata] convert drivers to use ata.h mode mask defines

No functional changes in this patch.

Signed-off-by: Erik Inge Bolsø <knan-lkml@anduin.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index a000c86..7112d89 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -160,7 +160,7 @@
 	{
 		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_MMIO | ATA_FLAG_PIO_POLLING,
-		.pio_mask	= 0x10, /* pio4 */
+		.pio_mask	= ATA_PIO4_ONLY,
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &qs_ata_ops,
 	},