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/openrisc/openrisc-generic/or1ksim.cfg b/board/openrisc/openrisc-generic/or1ksim.cfg
index d44ba43..9926093 100644
--- a/board/openrisc/openrisc-generic/or1ksim.cfg
+++ b/board/openrisc/openrisc-generic/or1ksim.cfg
@@ -5,19 +5,8 @@
 It contains the default configuration and help about configuring
 the simulator.
 
-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.
-
-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.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
 
 
 /* INTRODUCTION