arm64: dts: rockchip: add ir-receiver for rk3399-roc-pc

Like some other RK3399 boards RK3399-ROC-PC has an ir receiver
connected to pwm3 which can be used as gpio-ir-receiver.
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Link: https://lore.kernel.org/r/20210619121642.7892-1-knaerzche@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi

@@ -63,6 +63,13 @@ power {
 		};
 	};
 
+	ir-receiver {
+		compatible = "gpio-ir-receiver";
+		gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&ir_int>;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -601,6 +608,12 @@ pwr_key_l: pwr-key-l {
 		};
 	};
 
+	ir {
+		ir_int: ir-int {
+			rockchip,pins = <0 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	lcd-panel {
 		lcd_panel_reset: lcd-panel-reset {
 			rockchip,pins = <4 RK_PD5 RK_FUNC_GPIO &pcfg_pull_up>;