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/xilinx/ppc405-generic/Makefile b/board/xilinx/ppc405-generic/Makefile
index 73d5145..cc161ae 100644
--- a/board/xilinx/ppc405-generic/Makefile
+++ b/board/xilinx/ppc405-generic/Makefile
@@ -6,23 +6,7 @@
 # Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es
 # Work supported by Qtechnology http://www.qtec.com
 #
-# See file CREDITS for list of people who contributed to this
-# project.
-#
-# 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., 59 Temple Place, Suite 330, Boston,
-# MA 02111-1307 USA
+# SPDX-License-Identifier:	GPL-2.0+
 #
 
 include $(TOPDIR)/config.mk
diff --git a/board/xilinx/ppc405-generic/xilinx_ppc405_generic.c b/board/xilinx/ppc405-generic/xilinx_ppc405_generic.c
index 9bd1770..e3dd468 100644
--- a/board/xilinx/ppc405-generic/xilinx_ppc405_generic.c
+++ b/board/xilinx/ppc405-generic/xilinx_ppc405_generic.c
@@ -3,18 +3,7 @@
  * Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es
  * This work has been supported by: QTechnology  http://qtec.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.
- *
- * 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, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier:	GPL-2.0+
 */
 
 #include <config.h>
diff --git a/board/xilinx/ppc405-generic/xparameters.h b/board/xilinx/ppc405-generic/xparameters.h
index e8e8ced..f0ff78f 100644
--- a/board/xilinx/ppc405-generic/xparameters.h
+++ b/board/xilinx/ppc405-generic/xparameters.h
@@ -4,18 +4,7 @@
  * This work has been supported by: QTechnology  http://qtec.com/
  * based on xparameters-ml507.h by Xilinx
  *
- * 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, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier:	GPL-2.0+
 */
 
 #ifndef XPARAMETER_H