arm: dts: dra7x: Update devicetree header comments to sync with v6.3-rc6

Signed-off-by: Andrew Davis <afd@ti.com>
diff --git a/arch/arm/dts/dra72-evm-revc.dts b/arch/arm/dts/dra72-evm-revc.dts
index fafc2a4..a6dbdd5 100644
--- a/arch/arm/dts/dra72-evm-revc.dts
+++ b/arch/arm/dts/dra72-evm-revc.dts
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.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.
+ * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/
  */
 #include "dra72-evm-common.dtsi"
 #include "dra72x-mmc-iodelay.dtsi"