ARM: sun6i: dt: Add SPI controllers to the A31 DTSI

The A31 has 4 SPI controllers. Add them in the DTSI.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun6i-a31.dtsi

@@ -350,6 +350,46 @@
 			status = "disabled";
 		};
 
+		spi0: spi@01c68000 {
+			compatible = "allwinner,sun6i-a31-spi";
+			reg = <0x01c68000 0x1000>;
+			interrupts = <0 65 4>;
+			clocks = <&ahb1_gates 20>, <&spi0_clk>;
+			clock-names = "ahb", "mod";
+			resets = <&ahb1_rst 20>;
+			status = "disabled";
+		};
+
+		spi1: spi@01c69000 {
+			compatible = "allwinner,sun6i-a31-spi";
+			reg = <0x01c69000 0x1000>;
+			interrupts = <0 66 4>;
+			clocks = <&ahb1_gates 21>, <&spi1_clk>;
+			clock-names = "ahb", "mod";
+			resets = <&ahb1_rst 21>;
+			status = "disabled";
+		};
+
+		spi2: spi@01c6a000 {
+			compatible = "allwinner,sun6i-a31-spi";
+			reg = <0x01c6a000 0x1000>;
+			interrupts = <0 67 4>;
+			clocks = <&ahb1_gates 22>, <&spi2_clk>;
+			clock-names = "ahb", "mod";
+			resets = <&ahb1_rst 22>;
+			status = "disabled";
+		};
+
+		spi3: spi@01c6b000 {
+			compatible = "allwinner,sun6i-a31-spi";
+			reg = <0x01c6b000 0x1000>;
+			interrupts = <0 68 4>;
+			clocks = <&ahb1_gates 23>, <&spi3_clk>;
+			clock-names = "ahb", "mod";
+			resets = <&ahb1_rst 23>;
+			status = "disabled";
+		};
+
 		gic: interrupt-controller@01c81000 {
 			compatible = "arm,cortex-a7-gic", "arm,cortex-a15-gic";
 			reg = <0x01c81000 0x1000>,