ARM: dts: rockchip: Update compatible property for rk322x timer

Property set to '"rockchip,rk3228-timer", "rockchip,rk3288-timer"'
to match devicetree bindings.
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Suggested-by: Heiko Stübner <heiko@sntech.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

arch/arm/boot/dts/rk322x.dtsi

@@ -325,7 +325,7 @@ pwm3: pwm@110b0030 {
 	};
 
 	timer: timer@110c0000 {
-		compatible = "rockchip,rk3288-timer";
+		compatible = "rockchip,rk3228-timer", "rockchip,rk3288-timer";
 		reg = <0x110c0000 0x20>;
 		interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&xin24m>, <&cru PCLK_TIMER>;