ARM: shmobile: Remove Marzen reference DTS

Now that the DTS file r8a7779-marzen.dts can be used with
board-marzen.c and board-marzen-reference.c, proceed with removing
r8a7779-marzen-reference.dts.

Based on work for the Koelsch board by Laurent Pinchart.

Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7779-marzen-reference.dts

-/*
- * Reference Device Tree Source for the Marzen board
- *
- * Copyright (C) 2013 Renesas Solutions Corp.
- * Copyright (C) 2013 Simon Horman
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2.  This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-/dts-v1/;
-#include "r8a7779.dtsi"
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/interrupt-controller/irq.h>
-
-/ {
-	model = "marzen";
-	compatible = "renesas,marzen-reference", "renesas,r8a7779";
-
-	chosen {
-		bootargs = "console=ttySC2,115200 earlyprintk=sh-sci.2,115200 ignore_loglevel root=/dev/nfs ip=on rw";
-	};
-
-	memory {
-		device_type = "memory";
-		reg = <0x60000000 0x40000000>;
-	};
-
-	fixedregulator3v3: fixedregulator@0 {
-		compatible = "regulator-fixed";
-		regulator-name = "fixed-3.3V";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		regulator-boot-on;
-		regulator-always-on;
-	};
-
-	lan0@18000000 {
-		compatible = "smsc,lan9220", "smsc,lan9115";
-		reg = <0x18000000 0x100>;
-		pinctrl-0 = <&lan0_pins>;
-		pinctrl-names = "default";
-
-		phy-mode = "mii";
-		interrupt-parent = <&irqpin0>;
-		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
-		smsc,irq-push-pull;
-		reg-io-width = <4>;
-		vddvario-supply = <&fixedregulator3v3>;
-		vdd33a-supply = <&fixedregulator3v3>;
-	};
-
-	leds {
-		compatible = "gpio-leds";
-		led2 {
-			gpios = <&gpio4 29 GPIO_ACTIVE_HIGH>;
-		};
-		led3 {
-			gpios = <&gpio4 30 GPIO_ACTIVE_HIGH>;
-		};
-		led4 {
-			gpios = <&gpio4 31 GPIO_ACTIVE_HIGH>;
-		};
-	};
-};
-
-&irqpin0 {
-	status = "okay";
-};
-
-&pfc {
-	pinctrl-0 = <&scif2_pins &scif4_pins>;
-	pinctrl-names = "default";
-
-	lan0_pins: lan0 {
-		intc {
-			renesas,groups = "intc_irq1_b";
-			renesas,function = "intc";
-		};
-		lbsc {
-			renesas,groups = "lbsc_ex_cs0";
-			renesas,function = "lbsc";
-		};
-	};
-
-	scif2_pins: serial2 {
-		renesas,groups = "scif2_data_c";
-		renesas,function = "scif2";
-	};
-
-	scif4_pins: serial4 {
-		renesas,groups = "scif4_data";
-		renesas,function = "scif4";
-	};
-
-	sdhi0_pins: sd0 {
-		renesas,groups = "sdhi0_data4", "sdhi0_ctrl", "sdhi0_cd";
-		renesas,function = "sdhi0";
-	};
-
-	hspi0_pins: hspi0 {
-		renesas,groups = "hspi0";
-		renesas,function = "hspi0";
-	};
-};
-
-&sdhi0 {
-	pinctrl-0 = <&sdhi0_pins>;
-	pinctrl-names = "default";
-
-	vmmc-supply = <&fixedregulator3v3>;
-	bus-width = <4>;
-	status = "okay";
-};
-
-&hspi0 {
-	pinctrl-0 = <&hspi0_pins>;
-	pinctrl-names = "default";
-	status = "okay";
-};