riscv: dts: sophgo: sg2044: Add pinctrl device

Add pinctrl DT node and configuration for SG2044.

Link: https://lore.kernel.org/r/20250608232836.784737-10-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.dtsi

@@ -7,6 +7,7 @@
 #include <dt-bindings/clock/sophgo,sg2044-clk.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/pinctrl-sg2044.h>
 
 #include "sg2044-cpus.dtsi"
 #include "sg2044-reset.h"
@@ -329,6 +330,11 @@
 			clocks = <&osc>;
 		};
 
+		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>;