ARM: moxart: move fixed rate clock child node to board level dts

When a skeleton "clocks { .. }" remain in .dtsi, the child node can
be moved to .dts, "ref12" is then found by of_clk_get().

Signed-off-by: Jonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/moxart.dtsi

@@ -26,12 +26,6 @@
 	clocks {
 		#address-cells = <1>;
 		#size-cells = <0>;
-
-		ref12: ref12M {
-			compatible = "fixed-clock";
-			#clock-cells = <0>;
-			clock-frequency = <12000000>;
-		};
 	};
 
 	soc {