ide: add ide_pktcmd_tf_load() helper

Add ide_pktcmd_tf_load() helper and convert ATAPI device drivers to use it.

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 76f0ccd..02e9189 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -590,12 +590,8 @@
 	}
 
 	SELECT_DRIVE(drive);
-	if (IDE_CONTROL_REG)
-		HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
 
-	hwif->OUTB(dma, IDE_FEATURE_REG);
-	hwif->OUTB(bcount & 0xff, IDE_BCOUNTL_REG);
-	hwif->OUTB((bcount >> 8) & 0xff, IDE_BCOUNTH_REG);
+	ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK, bcount, dma);
 
 	if (dma)
 		set_bit(PC_DMA_OK, &pc->flags);