[PATCH] libata: Incorrect timing computation for PIO5/6

The ata timing computation code makes some mistakes in PIO5/6 because a
check was not updated correctly when I put this support into the kernel.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/libata-core.c

@@ -2303,7 +2303,7 @@ int ata_timing_compute(struct ata_device *adev, unsigned short speed,
 	 * DMA cycle timing is slower/equal than the fastest PIO timing.
 	 */
 
-	if (speed > XFER_PIO_4) {
+	if (speed > XFER_PIO_6) {
 		ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
 		ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
 	}