sh: add device tree source for J2 FPGA on Mimas v2 board

Signed-off-by: NRich Felker <dalias@libc.org>

arch/sh/boot/dts/j2_mimas_v2.dts

+/dts-v1/;
+
+/ {
+	compatible = "jcore,j2-soc";
+	model = "J2 FPGA SoC on Mimas v2 board";
+
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	interrupt-parent = <&aic>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "jcore,j2";
+			reg = <0>;
+			clock-frequency = <50000000>;
+			d-cache-size = <8192>;
+			i-cache-size = <8192>;
+			d-cache-block-size = <16>;
+			i-cache-block-size = <16>;
+		};
+	};
+
+	memory@10000000 {
+		device_type = "memory";
+		reg = <0x10000000 0x4000000>;
+	};
+
+	aliases {
+		serial0 = &uart0;
+		spi0 = &spi0;
+	};
+
+	chosen {
+		stdout-path = "serial0";
+	};
+
+	soc@abcd0000 {
+		compatible = "simple-bus";
+		ranges = <0 0xabcd0000 0x100000>;
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		aic: interrupt-controller@200 {
+			compatible = "jcore,aic1";
+			reg = <0x200 0x10>;
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+
+		cache-controller@c0 {
+			compatible = "jcore,cache";
+			reg = <0xc0 4>;
+		};
+
+		timer@200 {
+			compatible = "jcore,pit";
+			reg = <0x200 0x30>;
+			interrupts = <0x48>;
+		};
+
+		spi0: spi@40 {
+			compatible = "jcore,spi2";
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			spi-max-frequency = <25000000>;
+
+			reg = <0x40 0x8>;
+
+			sdcard@0 {
+				compatible = "mmc-spi-slot";
+				reg = <0>;
+				spi-max-frequency = <25000000>;
+				voltage-ranges = <3200 3400>;
+				mode = <0>;
+			};
+		};
+
+		uart0: serial@100 {
+			clock-frequency = <125000000>;
+			compatible = "xlnx,xps-uartlite-1.00.a";
+			current-speed = <19200>;
+			device_type = "serial";
+			interrupts = <0x12>;
+			port-number = <0>;
+			reg = <0x100 0x10>;
+		};
+	};
+};