[AGPGART] Fix up warning in efficeon driver.

efficeon-agp.c:222: warning: passing arg 1 of `virt_to_phys' makes pointer from integer without a cast
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/char/agp/efficeon-agp.c

@@ -219,7 +219,7 @@ static int efficeon_create_gatt_table(struct agp_bridge_data *bridge)
 
 		efficeon_private.l1_table[index] = page;
 
-		value = virt_to_gart(page) | pati | present | index;
+		value = virt_to_gart((unsigned long *)page) | pati | present | index;
 
 		pci_write_config_dword(agp_bridge->dev,
 			EFFICEON_ATTPAGE, value);