ARM: i.MX5 clocks: Remove optional clock setup (CKIH1) from i.MX51 template

External high frequency clock CKIH1 is optional for i.MX51, so move
it setup into boards where it is used.
Signed-off-by: NAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx51-apf51.dts

@@ -26,10 +26,6 @@
 	};
 
 	clocks {
-		ckih1 {
-			clock-frequency = <0>;
-		};
-
 		osc {
 			clock-frequency = <33554432>;
 		};

arch/arm/boot/dts/imx51-babbage.dts

@@ -63,6 +63,10 @@
 	};
 
 	clocks {
+		ckih1 {
+			clock-frequency = <22579200>;
+		};
+
 		clk_26M: codec_clock {
 			compatible = "fixed-clock";
 			reg=<0>;

arch/arm/boot/dts/imx51.dtsi

@@ -47,7 +47,7 @@
 
 		ckih1 {
 			compatible = "fsl,imx-ckih1", "fixed-clock";
-			clock-frequency = <22579200>;
+			clock-frequency = <0>;
 		};
 
 		ckih2 {