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/common/cmd_fitupd.c b/common/cmd_fitupd.c
index 618ff7c..e811473 100644
--- a/common/cmd_fitupd.c
+++ b/common/cmd_fitupd.c
@@ -1,9 +1,12 @@
-/*
- * (C) Copyright 2011
- * Andreas Pretzsch, carpe noctem engineering, apr@cn-eng.de
- *
- * This file is released under the terms of GPL v2 and any later version.
- * See the file COPYING in the root directory of the source tree for details.
+de <net.h>
+
+#if !defined(CONFIG_UPDATE_TFTP)
+#error "CONFIG_UPDATE_TFTP required"
+#endif
+
+static int do_fitupd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	ulong addr = 0Un the root directory of the source tree for details.
  */
 
 #include <common.h>