arm64: dts: rockchip: remove clock-frequency from rtc

'clock-frequency' is not part of the DT binding and not supported by the
Linux driver.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20221024165549.74574-3-sebastian.reichel@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3368-orion-r68-meta.dts

@@ -212,7 +212,6 @@ hym8563: rtc@51 {
 		compatible = "haoyu,hym8563";
 		reg = <0x51>;
 		#clock-cells = <0>;
-		clock-frequency = <32768>;
 		clock-output-names = "xin32k";
 		/* rtc_int is not connected */
 	};

arch/arm64/boot/dts/rockchip/rk3368-r88.dts

@@ -196,7 +196,6 @@ hym8563: rtc@51 {
 		compatible = "haoyu,hym8563";
 		reg = <0x51>;
 		#clock-cells = <0>;
-		clock-frequency = <32768>;
 		clock-output-names = "xin32k";
 		/* rtc_int is not connected */
 	};

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

@@ -104,7 +104,6 @@ hym8563: rtc@51 {
 		interrupt-parent = <&gpio0>;
 		interrupts = <RK_PA5 IRQ_TYPE_EDGE_FALLING>;
 		#clock-cells = <0>;
-		clock-frequency = <32768>;
 		clock-output-names = "xin32k";
 		pinctrl-names = "default";
 		pinctrl-0 = <&hym8563_int>;

arch/arm64/boot/dts/rockchip/rk3399pro-vmarc-som.dtsi

@@ -301,7 +301,6 @@ hym8563: rtc@51 {
 		compatible = "haoyu,hym8563";
 		reg = <0x51>;
 		#clock-cells = <0>;
-		clock-frequency = <32768>;
 		clock-output-names = "hym8563";
 		pinctrl-names = "default";
 		pinctrl-0 = <&hym8563_int>;

arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts

@@ -500,7 +500,6 @@ hym8563: rtc@51 {
 		interrupt-parent = <&gpio0>;
 		interrupts = <RK_PD3 IRQ_TYPE_EDGE_FALLING>;
 		#clock-cells = <0>;
-		clock-frequency = <32768>;
 		clock-output-names = "rtcic_32kout";
 		pinctrl-names = "default";
 		pinctrl-0 = <&hym8563_int>;

arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts

@@ -509,7 +509,6 @@ hym8563: rtc@51 {
 		interrupt-parent = <&gpio0>;
 		interrupts = <RK_PD3 IRQ_TYPE_LEVEL_LOW>;
 		#clock-cells = <0>;
-		clock-frequency = <32768>;
 		clock-output-names = "rtcic_32kout";
 		pinctrl-names = "default";
 		pinctrl-0 = <&hym8563_int>;