southbridge/ti: Update license headers

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

Change-Id: I61938b42c5aa75d1c7706a1c5ae45dace6704c86
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14330
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/southbridge/ti/pci1x2x/chip.h

@@ -1,3 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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.
+ */
+
 #ifndef SOUTHBRIDGE_TI_PCI1X2X_H
 #define SOUTHBRIDGE_TI_PCI1X2X_H