Revert "pata_atiixp: Don't use unconnected secondary port on SB600/SB700"

This reverts commit 5946fdae.

The original commit's assumption that the secondary port is
unconnected turns out to be false.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Markku Pesonen <tourula@gmail.com>
Fixes: 5946fdae ("pata_atiixp: Don't use unconnected secondary port on SB600/SB700")
Cc: Darren Stevens <darren@stevens-zone.net>

drivers/ata/pata_atiixp.c

@@ -278,11 +278,6 @@ static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	};
 	const struct ata_port_info *ppi[] = { &info, &info };
 
-	/* SB600/700 don't have secondary port wired */
-	if ((pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE) ||
-		(pdev->device == PCI_DEVICE_ID_ATI_IXP700_IDE))
-		ppi[1] = &ata_dummy_port_info;
-
 	return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
 				      ATA_HOST_PARALLEL_SCAN);
 }