ARM: dts: OMAP5: Remove clock-frequency field for cpu timers

The arm arch timers frequency are now programmed in the CNTFREQ
per-cpu register by the timer code using the secure API [1].
So remove the redundant entry from the dts.

[1] http://marc.info/?l=linux-omap&m=138139106312786&w=2

Signed-off-by: Sricharan R <r.sricharan@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>

arch/arm/boot/dts/omap5.dtsi

@@ -52,7 +52,6 @@
 			     <GIC_PPI 14 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 11 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 10 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_LOW)>;
-		clock-frequency = <6144000>;
 	};
 
 	gic: interrupt-controller@48211000 {