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/drivers/qe/uec_phy.c b/drivers/qe/uec_phy.c
index ac580a0..5dc4641 100644
--- a/drivers/qe/uec_phy.c
+++ b/drivers/qe/uec_phy.c
@@ -7,11 +7,7 @@
  *		Driver for UEC on QE
  *		Based on 8260_io/fcc_enet.c
  *
- * 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+
  */
 
 #include "common.h"