src/southbridge: Add and update license headers

This change adds and updates headers in all of the southbridge files
that had missing or unrecognized headers.  After this goes in, we can
turn on lint checking for headers in all southbridge directories.

Change-Id: I09614730bfd4db923dda103bd07bab02836a4c92
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/26570
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

src/southbridge/amd/amd8111/early_ctrl.c

@@ -1,7 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 yhlu
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 #include "amd8111.h"
 #include <reset.h>
 
-/* by yhlu 2005.10 */
 unsigned get_sbdn(unsigned bus)
 {
 	pci_devfn_t dev;