MMCONF_SUPPORT: Consolidate resource registration

Change-Id: Id727270bff9e0288747d178c00f3d747fe223b0f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/17695
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/northbridge/amd/agesa/family14/northbridge.c b/src/northbridge/amd/agesa/family14/northbridge.c
index f92183e..d66e83a 100644
--- a/src/northbridge/amd/agesa/family14/northbridge.c
+++ b/src/northbridge/amd/agesa/family14/northbridge.c
@@ -302,11 +302,7 @@
 	 * It is not honored by the coreboot resource allocator if it is in
 	 * the CPU_CLUSTER.
 	 */
-	struct resource *resource = new_resource(dev, 0xc0010058);
-	resource->base = CONFIG_MMCONF_BASE_ADDRESS;
-	resource->size = CONFIG_MMCONF_BUS_NUMBER * 4096 * 256;
-	resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
-	    IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
+	mmconf_resource(dev, 0xc0010058);
 }
 
 static void set_resource(device_t dev, struct resource *resource, u32 nodeid)