ODROID-M2: dtb/dtbo: add to switch FIQ debug port to UART2

Change-Id: I2933f7ac226ecbf7fabc7ca06461aa43cb37f275

arch/arm64/boot/dts/rockchip/overlays/odroidm2/Makefile

@@ -5,6 +5,7 @@ dtbo-y += \
 	can0.dtbo \
 	dht11.dtbo \
 	display_vu8s.dtbo \
+	fiq0_to_uart2.dtbo \
 	i2c0.dtbo \
 	i2c1.dtbo \
 	i2c2.dtbo \

arch/arm64/boot/dts/rockchip/overlays/odroidm2/fiq0_to_uart2.dts

@@ -0,0 +1,23 @@
+/dts-v1/;
+/plugin/;
+
+/{
+	fragment@0 {
+		target = <&fiq_debugger>;
+
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@1 {
+		target = <&uart2>;
+
+		__overlay__ {
+			status = "okay";
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart2m0_xfer>;
+		};
+	};
+};