ARM: dts: i.MX25: add the clocks for the EPIT blocks

The i.MX25 contains two EPIT (Enhanced Periodic Interrupt Timer)
function blocks. Add their ipg and per clocks to the device tree.

Signed-off-by: Martin Kaiser <[e-mail]>
Acked-by: Clément Péron <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx25.dtsi

···
 			epit1: timer@53f94000 {
 				compatible = "fsl,imx25-epit";
 				reg = <0x53f94000 0x4000>;
+				clocks = <&clks 83>, <&clks 43>;
+				clock-names = "ipg", "per";
 				interrupts = <28>;
 			};
 
 			epit2: timer@53f98000 {
 				compatible = "fsl,imx25-epit";
 				reg = <0x53f98000 0x4000>;
+				clocks = <&clks 84>, <&clks 43>;
+				clock-names = "ipg", "per";
 				interrupts = <27>;
 			};