riscv: dts: sophgo: add pwm controller for SG2044

Add pwm device node for SG2044.

Signed-off-by: Longbin Li <looong.bin@gmail.com>
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Link: https://lore.kernel.org/r/20250608232836.784737-12-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: looongbin

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

@@ -63,6 +63,10 @@
 	};
 };
 
+&pwm {
+	status = "okay";
+};
+
 &sd {
 	bus-width = <4>;
 	no-sdio;

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

@@ -347,6 +347,16 @@
 			};
 		};
 
+		pwm: pwm@704000c000 {
+			compatible = "sophgo,sg2044-pwm";
+			reg = <0x70 0x4000c000 0x0 0x1000>;
+			#pwm-cells = <3>;
+			clocks = <&clk CLK_GATE_APB_PWM>;
+			clock-names = "apb";
+			resets = <&rst RST_PWM>;
+			status = "disabled";
+		};
+
 		syscon: syscon@7050000000 {
 			compatible = "sophgo,sg2044-top-syscon", "syscon";
 			reg = <0x70 0x50000000 0x0 0x1000>;