arm64: dts: qcom: sc7180-lite: Tweak DDR/L3 scaling on SC7180-lite

Tweak the DDR/L3 bandwidth votes on the lite variant of the SC7180 SoC
since the gold cores only support frequencies upto 2.1 GHz.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/1606198876-3515-1-git-send-email-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>