Add GPL-2.0+ SPDX-License-Identifier to source files

Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/board/freescale/p2041rdb/cpld.c b/board/freescale/p2041rdb/cpld.c
index a4bcc18..34901aa 100644
--- a/board/freescale/p2041rdb/cpld.c
+++ b/board/freescale/p2041rdb/cpld.c
@@ -2,10 +2,7 @@
  * Copyright 2011 Freescale Semiconductor
  * Author: Mingkai Hu <Mingkai.hu@freescale.com>
  *
- * 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; either version 2 of the License, or (at your option)
- * any later version.
+ * SPDX-License-Identifier:	GPL-2.0+
  *
  * This file provides support for the board-specific CPLD used on some Freescale
  * reference boards.
@@ -13,7 +10,6 @@
  * The following macros need to be defined:
  *
  * CPLD_BASE - The virtual address of the base of the CPLD register map
- *
  */
 
 #include <common.h>