libata: dev_config does not need ap and adev passing

It used to be impossible to get from ata_device to ata_port but that is
no longer true. Various methods have been cleaned up over time but
dev_config still takes both and most users don't need both anyway. Tidy
this one up

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 0a14933..a764ce8 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -244,7 +244,6 @@
 
 /**
  *	pdc2026x_dev_config	-	device setup hook
- *	@ap: ATA port
  *	@adev: newly found device
  *
  *	Perform chip specific early setup. We need to lock the transfer
@@ -252,7 +251,7 @@
  *	barf.
  */
 
-static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
+static void pdc2026x_dev_config(struct ata_device *adev)
 {
 	adev->max_sectors = 256;
 }