ARM: dts: am572x-idk: Add tricolor Industrial LED support

AM572x-IDK rev 1.3A has tricolor RGB LEDs that can be controlled using
GPIO. Expose these to userspace for usage as necessary.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am572x-idk-common.dtsi

@@ -55,6 +55,82 @@ mmc0-led {
 			linux,default-trigger = "mmc0";
 		};
 	};
+
+	idk-leds {
+		status = "disabled";
+		compatible = "gpio-leds";
+		red0-led {
+			label = "idk:red0";
+			gpios = <&gpio6 19 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		green0-led {
+			label = "idk:green0";
+			gpios = <&gpio3 9 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		blue0-led {
+			label = "idk:blue0";
+			gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		red1-led {
+			label = "idk:red1";
+			gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		green1-led {
+			label = "idk:green1";
+			gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		blue1-led {
+			label = "idk:blue1";
+			gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		red2-led {
+			label = "idk:red2";
+			gpios = <&gpio7 9 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		green2-led {
+			label = "idk:green2";
+			gpios = <&gpio7 8 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		blue2-led {
+			label = "idk:blue2";
+			gpios = <&gpio7 10 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		red3-led {
+			label = "idk:red3";
+			gpios = <&gpio7 11 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		green3-led {
+			label = "idk:green3";
+			gpios = <&gpio3 17 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		blue3-led {
+			label = "idk:blue3";
+			gpios = <&gpio3 18 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+	};
 };
 
 &extcon_usb2 {