arm64: dts: qcom: sm8350: Specify clock-frequency for arch timer

Arch timer runs at 19.2 MHz. Specify the rate in the timer node.
Signed-off-by: NKonrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211114012755.112226-4-konrad.dybcio@somainline.org

arch/arm64/boot/dts/qcom/sm8350.dtsi

@@ -2484,5 +2484,6 @@
 			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>;
+		clock-frequency = <19200000>;
 	};
 };