agp: Add device id for P4M900 to via-agp module

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/agp/via-agp.c b/drivers/char/agp/via-agp.c
index 9aaf401..0ecc54d 100644
--- a/drivers/char/agp/via-agp.c
+++ b/drivers/char/agp/via-agp.c
@@ -399,6 +399,11 @@
 		.device_id  = PCI_DEVICE_ID_VIA_P4M890,
 		.chipset_name   = "P4M890",
 	},
+	/* P4M900 */
+	{
+		.device_id  = PCI_DEVICE_ID_VIA_VT3364,
+		.chipset_name   = "P4M900",
+	},
 	{ }, /* dummy final entry, always present */
 };