riscv: dts: sophgo: sophgo-srd3-10: add HWMON MCU device

Add MCU devicetree node for Sophgo SRD3-10 board. This is used to
provide SUSP function for the board.

Link: https://lore.kernel.org/r/20250608232836.784737-8-inochiama@gmail.com
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Signed-off-by: Chen Wang <wangchen20@iscas.ac.cn>

Author: inochisa

arch/riscv/boot/dts/sophgo/sg2044-sophgo-srd3-10.dts

@@ -36,6 +36,16 @@
 	status = "okay";
 };
 
+&i2c1 {
+	status = "okay";
+
+	mcu: syscon@17 {
+		compatible = "sophgo,sg2044-hwmon-mcu", "sophgo,sg2042-hwmon-mcu";
+		reg = <0x17>;
+		#thermal-sensor-cells = <1>;
+	};
+};
+
 &sd {
 	bus-width = <4>;
 	no-sdio;