arm64: dts: rockchip: Add magnetometer sensor to Pinephone Pro

Pinephone Pro uses AF8133J according to the schematic.

The mount-matrix was added by Leonardo on top of Ondrej's work of adding
the magnetometer. It was verified with Leonardo's compass app:

https://gitlab.com/lgtrombetta/compass

Co-developed-by: Leonardo G. Trombetta <lgtrombetta@gmx.com>
Signed-off-by: Leonardo G. Trombetta <lgtrombetta@gmx.com>
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rudraksha Gupta <guptarud@gmail.com>
Link: https://patch.msgid.link/20251225-ppp_light_accel_mag_vol-down-v6-1-8c79a4e87001@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: Ondrej Jirman

arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts

@@ -543,6 +543,23 @@
 	};
 };
 
+&i2c4 {
+	af8133j: compass@1c {
+		compatible = "voltafield,af8133j";
+		reg = <0x1c>;
+		avdd-supply = <&vcc_3v0>;
+		dvdd-supply = <&vcc_1v8>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&compass_rst_l>;
+		reset-gpios = <&gpio1 RK_PA1 GPIO_ACTIVE_LOW>;
+
+		mount-matrix =
+			"0", "1", "0",
+			"-1", "0", "0",
+			"0", "0", "1";
+	};
+};
+
 &io_domains {
 	bt656-supply = <&vcc1v8_dvp>;
 	audio-supply = <&vcca1v8_codec>;
@@ -655,6 +672,12 @@
 		};
 	};
 
+	compass {
+		compass_rst_l: compass-rst-l {
+			rockchip,pins = <1 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	leds {
 		red_led_pin: red-led-pin {
 			rockchip,pins = <4 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;