ARM: dts: rockchip: Pass the 'arm,cpu-registers-not-fw-configured' property on rv1108

Since firmware does not initialize  any of the generic timer CPU
registers pass the 'arm,cpu-registers-not-fw-configured' property as
suggested in Documentation/devicetree/bindings/timer/arm,arch_timer.txt.

This also aligns with other Rockchip SoC dtsi files.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rv1108.dtsi

@@ -74,6 +74,7 @@ timer {
 		compatible = "arm,armv7-timer";
 		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(1) | IRQ_TYPE_LEVEL_HIGH)>,
 			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(1) | IRQ_TYPE_LEVEL_HIGH)>;
+		arm,cpu-registers-not-fw-configured;
 		clock-frequency = <24000000>;
 	};