[libata] convert drivers to use ata.h mode mask defines

No functional changes in this patch.

Signed-off-by: Erik Inge Bolsø <knan-lkml@anduin.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c
index 34a3942..5acf9fa 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -211,7 +211,7 @@
 {
 	static const struct ata_port_info info = {
 		.flags = ATA_FLAG_SLAVE_POSS,
-		.pio_mask = 0x1f,
+		.pio_mask = ATA_PIO4,
 		.port_ops = &cmd640_port_ops
 	};
 	const struct ata_port_info *ppi[] = { &info, NULL };