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/avnet/fx12mm/Makefile b/board/avnet/fx12mm/Makefile
index f943781..2dd48b6 100644
--- a/board/avnet/fx12mm/Makefile
+++ b/board/avnet/fx12mm/Makefile
@@ -3,23 +3,7 @@
 # Ricardo Ribalda,Universidad Autonoma de Madrid, ricardo.ribalda@uam.es
 # This work has been supported by: Qtechnology http://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+
 #
 
 COBJS	+= $(BOARD).o
diff --git a/board/avnet/fx12mm/fx12mm.c b/board/avnet/fx12mm/fx12mm.c
index c975efa..92e1cfb 100644
--- a/board/avnet/fx12mm/fx12mm.c
+++ b/board/avnet/fx12mm/fx12mm.c
@@ -6,24 +6,7 @@
  * Modified by:
  *  Georg Schardt <schardt@team-ctech.de>
  *
- * 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 <config.h>
diff --git a/board/avnet/fx12mm/xparameters.h b/board/avnet/fx12mm/xparameters.h
index 4410f19..94f682f 100644
--- a/board/avnet/fx12mm/xparameters.h
+++ b/board/avnet/fx12mm/xparameters.h
@@ -3,23 +3,7 @@
  *
  * Georg Schardt <schardt@team-ctech.de>
  *
- * 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+
  *
  * CAUTION: This file is based on the xparameters.h automatically
  * generated by libgen. Version: Xilinx EDK 10.1.02 Build EDK_K_SP2.5