arm64: dts: qcom: sc7180: Remove clock for bluetooth on SC7180 IDP board

Removed voting for RPMH_RF_CLK2 which is not required as it is
getting managed by BT SoC through SW_CTRL line.

Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>
Link: https://lore.kernel.org/r/1599734980-22580-1-git-send-email-gubbaven@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>