arm64: dts: rockchip: Add RTC support for RK3588

Add DT node to enable RTC support on RK3588 board.

Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com>

arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts

@@ -80,6 +80,23 @@ sound {
 	};
 };
 
+&i2c6 {
+	status = "okay";
+
+	hym8563: hym8563@51 {
+		compatible = "haoyu,hym8563";
+		reg = <0x51>;
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "hym8563";
+		pinctrl-names = "default";
+		pinctrl-0 = <&hym8563_int>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PB0 IRQ_TYPE_LEVEL_LOW>;
+		wakeup-source;
+	};
+};
+
 &i2c7 {
 	status = "okay";
 
@@ -184,6 +201,12 @@ &usb_host1_ohci {
 };
 
 &pinctrl {
+	hym8563 {
+		hym8563_int: hym8563-int {
+			rockchip,pins = <0 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	sound {
 		hp_detect: hp-detect {
 			rockchip,pins = <1 RK_PD5 RK_FUNC_GPIO &pcfg_pull_none>;