pata-rb532-cf: use ata_sff_data_xfer32()

The biggest difference between rb532_pata_data_xfer() and
ata_sff_data_xfer32() is the call to ata_sff_pause() at the end of
rb532_pata_data_xfer() which I suppose to be unnecessary since it works
without. I've also tested using ata_sff_data_xfer() as replacement, but
since we know that the driver supports 32bit IO, using the optimised
version should be safe.
Signed-off-by: NPhil Sutter <n0-1@freewrt.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/ata/pata_rb532_cf.c

@@ -54,25 +54,6 @@ struct rb532_cf_info {
 
 /* ------------------------------------------------------------------------ */
 
-static unsigned int rb532_pata_data_xfer(struct ata_device *adev, unsigned char *buf,
-				unsigned int buflen, int write_data)
-{
-	struct ata_port *ap = adev->link->ap;
-	void __iomem *ioaddr = ap->ioaddr.data_addr;
-	int retlen = buflen;
-
-	if (write_data) {
-		for (; buflen > 0; buflen--, buf++)
-			writeb(*buf, ioaddr);
-	} else {
-		for (; buflen > 0; buflen--, buf++)
-			*buf = readb(ioaddr);
-	}
-
-	ata_sff_pause(ap);
-	return retlen;
-}
-
 static void rb532_pata_freeze(struct ata_port *ap)
 {
 	struct rb532_cf_info *info = ap->host->private_data;
@@ -105,7 +86,7 @@ static irqreturn_t rb532_pata_irq_handler(int irq, void *dev_instance)
 
 static struct ata_port_operations rb532_pata_port_ops = {
 	.inherits		= &ata_sff_port_ops,
-	.sff_data_xfer		= rb532_pata_data_xfer,
+	.sff_data_xfer		= ata_sff_data_xfer32,
 	.freeze			= rb532_pata_freeze,
 	.thaw			= rb532_pata_thaw,
 };