libata: kill ATA_DNXFER_ANY

ATA_DNXFER_ANY isn't used anymore.  Kill it.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/libata-core.c

@@ -2360,15 +2360,6 @@ int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
 		udma_mask = 0;
 		break;
 
-	case ATA_DNXFER_ANY:
-		/* don't gear down to MWDMA from UDMA, go directly to PIO */
-		if (xfer_mask & ATA_MASK_UDMA)
-			xfer_mask &= ~ATA_MASK_MWDMA;
-
-		highbit = fls(xfer_mask) - 1;
-		xfer_mask &= ~(1 << highbit);
-		break;
-
 	default:
 		BUG();
 	}

drivers/ata/libata.h

@@ -48,7 +48,6 @@ enum {
 	ATA_DNXFER_40C		= 2,	/* apply 40c cable limit */
 	ATA_DNXFER_FORCE_PIO	= 3,	/* force PIO */
 	ATA_DNXFER_FORCE_PIO0	= 4,	/* force PIO0 */
-	ATA_DNXFER_ANY		= 5,	/* speed down any */
 
 	ATA_DNXFER_QUIET	= (1 << 31),
 };