arm64: dts: rockchip: enable rk3328 watchdog clock

Add the missing clock property for the watchdog on rk3328.
Signed-off-by: Leonidas P. Papadakos <papadakospan@gmail.com>
[set wdt node to always enabled, as it is not board-specific]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3328.dtsi

@@ -407,6 +407,7 @@ wdt: watchdog@ff1a0000 {
 		compatible = "snps,dw-wdt";
 		reg = <0x0 0xff1a0000 0x0 0x100>;
 		interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru PCLK_WDT>;
 	};
 
 	pwm0: pwm@ff1b0000 {