Add more SPDX-License-Identifier tags

In a number of places we had wordings of the GPL (or LGPL in a few
cases) license text that were split in such a way that it wasn't caught
previously.  Convert all of these to the correct SPDX-License-Identifier
tag.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/cmd_fs.c b/common/cmd_fs.c
index e146254..8f8f1b2 100644
--- a/common/cmd_fs.c
+++ b/common/cmd_fs.c
@@ -3,17 +3,7 @@
  *
  * Inspired by cmd_ext_common.c, cmd_fat.c.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier:	GPL-2.0
  */
 
 #include <common.h>
diff --git a/common/ddr_spd.c b/common/ddr_spd.c
index 438e71a..0aa1cbf 100644
--- a/common/ddr_spd.c
+++ b/common/ddr_spd.c
@@ -1,9 +1,7 @@
 /*
  * Copyright 2008-2014 Freescale Semiconductor, Inc.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * Version 2 as published by the Free Software Foundation.
+ * SPDX-License-Identifier:	GPL-2.0
  */
 
 #include <common.h>