ARM: dts: rockchip: add clocks property to cru node rk3288

Add clocks property to rk3288 cru node to fix warnings like:
'clocks' is a dependency of 'assigned-clocks'.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20220329113657.4567-2-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288.dtsi

@@ -862,6 +862,8 @@ sgrf: syscon@ff740000 {
 	cru: clock-controller@ff760000 {
 		compatible = "rockchip,rk3288-cru";
 		reg = <0x0 0xff760000 0x0 0x1000>;
+		clocks = <&xin24m>;
+		clock-names = "xin24m";
 		rockchip,grf = <&grf>;
 		#clock-cells = <1>;
 		#reset-cells = <1>;