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

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

This reverts commit 185e2d489f1ed804c14b1fd56188c41e940fe8f4.

The clock-frequency property was meant to aid platforms with broken firmwares
that don't set up the timer properly on their own. Don't include it where it is
not the case.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211202004328.459899-1-konrad.dybcio@somainline.org