src/device: Update license headers

Update all of the license headers to make sure they are compliant
with coreboot's license header policy.

Change-Id: I5e5180ec4303a121609b4acffb284daea6b08379
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14325
Reviewed-by: Myles Watson <mylesgw@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/device/device.c b/src/device/device.c
index e23c9de..9ea32cc 100644
--- a/src/device/device.c
+++ b/src/device/device.c
@@ -13,10 +13,16 @@
  * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
  * Copyright (C) 2005-2006 Stefan Reinauer <stepan@openbios.org>
  * Copyright (C) 2009 Myles Watson <mylesgw@gmail.com>
- */
-
-/*
- *      (c) 1999--2000 Martin Mares <mj@suse.cz>
+ * Copyright (c) 1999--2000 Martin Mares <mj@suse.cz>
+ *
+ * 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.
  */
 
 /*