ARM: dts: qcom: msm8960: drop second clock frequency from timer

Keep only one clock frequency for timer, because:
1. DT schema does not allow multiple frequencies in such property,
2. The Linux timer driver reads only first frequency.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Konrad Dybcio <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-msm8960.dtsi

···
 				     <GIC_PPI 2 0x301>,
 				     <GIC_PPI 3 0x301>;
 			reg = <0x0200a000 0x100>;
-			clock-frequency = <27000000>,
-					  <32768>;
+			clock-frequency = <27000000>;
 			cpu-offset = <0x80000>;
 		};