libata: Switch most of the remaining SFF drivers to ata_sff_port_start

This avoids allocating DMA buffers if not needed but at the moment is
mostly just a neatness item.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 4188898..988ef73 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -563,7 +563,7 @@
 	struct it821x_dev *itdev;
 	u8 conf;
 
-	int ret = ata_port_start(ap);
+	int ret = ata_sff_port_start(ap);
 	if (ret < 0)
 		return ret;