MIPS: DTS: jz4780: add #clock-cells to rtc_dev

This makes the driver present the clk32k signal if requested.
It is needed to clock the PMU of the BCM4330 WiFi and Bluetooth
module of the CI20 board.

Signed-off-by: H. Nikolaus Schaller <[email protected]>
Reviewed-by: Paul Cercueil <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

Author: goldelico

arch/mips/boot/dts/ingenic/jz4780.dtsi

@@ -155,6 +155,8 @@
 
 		clocks = <&cgu JZ4780_CLK_RTCLK>;
 		clock-names = "rtc";
+
+		#clock-cells = <0>;
 	};
 
 	pinctrl: pin-controller@10010000 {