pata_pdc202xx_old: fix UDMA33 handling

The original driver doesn't use 66 MHz clock for UDMA33.

[ The alternative solution would be to adjust UDMA33 timings
  for 66 MHz clock but I think that it is safer to stick with
  old & tested behavior for now. ]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/pata_pdc202xx_old.c

@@ -2,7 +2,7 @@
  * pata_pdc202xx_old.c 	- Promise PDC202xx PATA for new ATA layer
  *			  (C) 2005 Red Hat Inc
  *			  Alan Cox <alan@lxorguk.ukuu.org.uk>
- *			  (C) 2007 Bartlomiej Zolnierkiewicz
+ *			  (C) 2007,2009 Bartlomiej Zolnierkiewicz
  *
  * Based in part on linux/drivers/ide/pci/pdc202xx_old.c
  *
@@ -158,7 +158,7 @@ static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
 	u32 len;
 
 	/* Check we keep host level locking here */
-	if (adev->dma_mode >= XFER_UDMA_2)
+	if (adev->dma_mode > XFER_UDMA_2)
 		iowrite8(ioread8(clock) | sel66, clock);
 	else
 		iowrite8(ioread8(clock) & ~sel66, clock);
@@ -212,7 +212,7 @@ static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
 		iowrite8(ioread8(clock) & ~sel66, clock);
 	}
 	/* Flip back to 33Mhz for PIO */
-	if (adev->dma_mode >= XFER_UDMA_2)
+	if (adev->dma_mode > XFER_UDMA_2)
 		iowrite8(ioread8(clock) & ~sel66, clock);
 	ata_bmdma_stop(qc);
 	pdc202xx_set_piomode(ap, adev);