ARM: dts: am3517-evm: Sync DTS with Linux 5.17-rc5

Sync the am3517-evm device tree files with those from Linux
5.17-rc5 with some additional fixes for pinmuxing Ethernet and
moving the pinmux references to the respective peripherals.

Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Derald D. Woods <woods.technical@gmail.com>
diff --git a/arch/arm/dts/am3517-som.dtsi b/arch/arm/dts/am3517-som.dtsi
index b1c988e..8b669e2 100644
--- a/arch/arm/dts/am3517-som.dtsi
+++ b/arch/arm/dts/am3517-som.dtsi
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2016 Derald D. Woods <woods.technical@gmail.com>
  *
  * Based on am3517-evm.dts
- *
- * 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.
  */
 
 / {