arm64: dts: rockchip: Add RTC to Khadas Edge 2

Khadas Edge 2 has PT7C4363 RTC that compatible with HYM8563.
The RTC pinctrl is also connected to MCU.
Signed-off-by: Muhammed Efe Cetin <efectn@protonmail.com>
Link: https://lore.kernel.org/r/4c4c9140ff36f290ba64ecc8b3e218df6a5ab273.1708381247.git.efectn@protonmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts

@@ -216,6 +216,18 @@ regulator-state-mem {
 	};
 };
 
+&i2c2 {
+	status = "okay";
+
+	hym8563: rtc@51 {
+		compatible = "haoyu,hym8563";
+		reg = <0x51>;
+		#clock-cells = <0>;
+		clock-output-names = "hym8563";
+		wakeup-source;
+	};
+};
+
 &pinctrl {
 	vdd_sd {
 		vdd_sd_en: vdd-sd-en {