ARM: at91: dts: sama5d29: Add dtsi file for sama5d29

A new dtsi file for sama5d29 SoC is added which basically inherits the sama5d2
dtsi with the mac controller compatible property updated.
Signed-off-by: Hari Prasath <Hari.PrasathGE@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210812140758.28273-1-Hari.PrasathGE@microchip.com

arch/arm/boot/dts/sama5d29.dtsi

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * sama5d29.dtsi - Device Tree Include file for SAMA5D29 SoC of the SAMA5D2
+ * family.
+ *
+ *  Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
+ *
+ *  Author: Hari Prasath <Hari.PrasathGE@microchip.com>
+ *
+ */
+
+#include "sama5d2.dtsi"
+
+&macb0 {
+	compatible = "atmel,sama5d29-gem";
+};