arm64: dts: qcom: sc7280: Enable MDP turbo mode

arm64: dts: qcom: sc7280: Enable MDP turbo mode

The max frequency listed in the DPU opp-table is 506MHz, this is not
sufficient to drive a 4k@60 display, resulting in constant underrun.

Add the missing MDP_CLK turbo frequency of 608MHz to the opp-table to
fix this.

Acked-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/r/20240326-rb3gen2-dp-connector-v2-1-a9f1bc32ecaf@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>