[libata] MWDMA0 is unsupported on PIIX-like PATA controllers

MWDMA0 timings cannot be met with the PIIX based controller
programming interface.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/pata_efar.c

@@ -252,7 +252,7 @@ static int efar_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	static const struct ata_port_info info = {
 		.flags		= ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= ATA_PIO4,
-		.mwdma_mask	= ATA_MWDMA2,
+		.mwdma_mask	= ATA_MWDMA12_ONLY,
 		.udma_mask 	= ATA_UDMA4,
 		.port_ops	= &efar_ops,
 	};

drivers/ata/pata_oldpiix.c

@@ -239,7 +239,7 @@ static int oldpiix_init_one (struct pci_dev *pdev, const struct pci_device_id *e
 	static const struct ata_port_info info = {
 		.flags		= ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= ATA_PIO4,
-		.mwdma_mask	= ATA_MWDMA2,
+		.mwdma_mask	= ATA_MWDMA12_ONLY,
 		.port_ops	= &oldpiix_pata_ops,
 	};
 	const struct ata_port_info *ppi[] = { &info, NULL };

drivers/ata/pata_rdc.c

@@ -284,7 +284,7 @@ static struct ata_port_info rdc_port_info = {
 
 	.flags		= ATA_FLAG_SLAVE_POSS,
 	.pio_mask	= ATA_PIO4,
-	.mwdma_mask	= ATA_MWDMA2,
+	.mwdma_mask	= ATA_MWDMA12_ONLY,
 	.udma_mask	= ATA_UDMA5,
 	.port_ops	= &rdc_pata_ops,
 };