ARM: dts: rockchip: Pass the 'clock-latency' property on rv1108

Like it is done on cpu nodes of other Rockchip SoCs, pass the
'clock-latency' property to the CPU node, so that cpufreq driver
can take the latency into account when switching frequencies.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rv1108.dtsi

@@ -32,6 +32,7 @@ cpu0: cpu@f00 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a7";
 			reg = <0xf00>;
+			clock-latency = <40000>;
 			clocks = <&cru ARMCLK>;
 			#cooling-cells = <2>; /* min followed by max */
 			dynamic-power-coefficient = <75>;