arm64: dts: qcom: sc7180: Support ETMv4 power management

arm64: dts: qcom: sc7180: Support ETMv4 power management

Now that deep idle states are properly supported on SC7180,
we need to add "coresight-loses-context-with-cpu" property
to avoid failure of trace session because of losing context
on entering deep idle states.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Link: https://lore.kernel.org/r/20200424111644.27970-1-saiprakash.ranjan@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>