[AGPGART] VIA PT880 Ultra support.

This patch enables agpgart on a Via "PT880 Ultra" based motherboard
(Asus P4V800D-X). The PCI ID of the PT880 Ultra is 0x0308 instead of
0x0258 of the PT880.

The patched via-agp passes testgart.

Signed-off-by: Magnus Kessler <Magnus.Kessler@gmx.net>
Signed-off-by: Dave Jones <davej@redhat.com>
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index d6fe048..590dc6d 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1231,6 +1231,7 @@
 #define PCI_DEVICE_ID_VIA_8380_0	0x0204
 #define PCI_DEVICE_ID_VIA_3238_0	0x0238
 #define PCI_DEVICE_ID_VIA_PT880		0x0258
+#define PCI_DEVICE_ID_VIA_PT880ULTRA	0x0308
 #define PCI_DEVICE_ID_VIA_PX8X0_0	0x0259
 #define PCI_DEVICE_ID_VIA_3269_0	0x0269
 #define PCI_DEVICE_ID_VIA_K8T800PRO_0	0x0282