arm: dts: MediaTek: add device tree for MT7629

This patch adds MT7629 device tree and the includes it needs.

Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/mt7629-rfb.dts b/arch/arm/dts/mt7629-rfb.dts
new file mode 100644
index 0000000..a6d28a0
--- /dev/null
+++ b/arch/arm/dts/mt7629-rfb.dts
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ *
+ * SPDX-License-Identifier: (GPL-2.0 OR MIT)
+ */
+
+/dts-v1/;
+#include "mt7629.dtsi"
+
+/ {
+	model = "MediaTek MT7629 RFB";
+	compatible = "mediatek,mt7629-rfb", "mediatek,mt7629";
+
+	aliases {
+		spi0 = &qspi;
+	};
+
+	chosen {
+		stdout-path = &uart0;
+		tick-timer = &timer0;
+	};
+};
+
+&pinctrl {
+	qspi_pins: qspi-pins {
+		mux {
+			function = "flash";
+			groups = "spi_nor";
+		};
+	};
+
+	uart0_pins: uart0-default {
+		mux {
+			function = "uart";
+			groups = "uart0_txd_rxd";
+		};
+	};
+
+	watchdog_pins: watchdog-default {
+		mux {
+			function = "watchdog";
+			groups = "watchdog";
+		};
+	};
+};
+
+&qspi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&qspi_pins>;
+	status = "okay";
+
+	spi-flash@0{
+		compatible = "spi-flash";
+		reg = <0>;
+		u-boot,dm-pre-reloc;
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
+	status = "okay";
+};
+
+&watchdog {
+	pinctrl-names = "default";
+	pinctrl-0 = <&watchdog_pins>;
+	status = "okay";
+};