arm: dts: dm8x: Update devicetree header comments to sync with v6.3-rc6

Signed-off-by: Andrew Davis <afd@ti.com>
diff --git a/arch/arm/dts/da850.dtsi b/arch/arm/dts/da850.dtsi
index 559659b..e6e78b8 100644
--- a/arch/arm/dts/da850.dtsi
+++ b/arch/arm/dts/da850.dtsi
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 2012 DENX Software Engineering GmbH
  * Heiko Schocher <hs@denx.de>
- *
- * 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.
  */
 #include <dt-bindings/interrupt-controller/irq.h>