Add pci class code for SATA & AHCI, and replace some magic numbers.

Signed-off-by: Conke Hu <conke.hu@amd.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 11217bd..1e6eda2 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -871,7 +871,7 @@
 		pci_write_config_byte(pdev, 0xa, 6);
 		pci_write_config_byte(pdev, 0x40, tmp);
 
-		pdev->class = 0x010601;
+		pdev->class = PCI_CLASS_STORAGE_SATA_AHCI;
 	}
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_sb600_sata);