[E58][DTS] Configure pinmux for PWM0

For some reason, in Genio510 GPIO29 isn't muxed to PWM0 by default

arch/arm64/boot/dts/seco/seco-genio-common.dtsi

@@ -475,6 +475,12 @@ &dpi1 {
 	status = "okay";
 };
 
+&disp_pwm0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&disp_pwm0_pin_default>;
+	status = "okay";
+};
+
 &dp_intf1 {
 	status = "disabled";
 	mediatek,oob-hpd;
@@ -1028,6 +1034,12 @@ irq-pin {
 			pinmux = <PINMUX_GPIO13__FUNC_B_GPIO13>;
 		};
 	};
+
+	disp_pwm0_pin_default: disp-pwm0-pin-default {
+		pins0 {
+			pinmux = <PINMUX_GPIO29__FUNC_O_DISP_PWM0>;
+		};
+	};
 };