arm: dts: mediatek: converted to using SPDX identifiers

Convert boilerplate license statement into proper SPDX identifier style.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
index 05cf65c..180377e 100644
--- a/arch/arm/boot/dts/mt2701.dtsi
+++ b/arch/arm/boot/dts/mt2701.dtsi
@@ -1,15 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2015 MediaTek Inc.
  * Author: Erin.Lo <erin.lo@mediatek.com>
  *
- * 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.
- *
- * 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.
  */
 
 #include <dt-bindings/clock/mt2701-clk.h>