riscv: dts: sophgo: Add pinctrl support for SG2044

Add pinctrl DT node and configuration for SG2044.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>

Author: inochisa

arch/riscv/boot/dts/sophgo/sg2044.dtsi

@@ -325,6 +325,11 @@
 			reg = <0x70 0x50000000 0x0 0x1000>;
 		};
 
+		pinctrl: pinctrl@7050001000 {
+			compatible = "sophgo,sg2044-pinctrl";
+			reg = <0x70 0x50001000 0x0 0x1000>;
+		};
+
 		clk: clock-controller@7050002000 {
 			compatible = "sophgo,sg2044-clk";
 			reg = <0x70 0x50002000 0x0 0x1000>;