arm64: dts: qcom: sm8250: Don't disable MDP explicitly

DPU/MDSS is borderline useless without MDP, so disabling
both of them makes little sense. With this change, enabling
mdss will be enough.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210613110635.46537-1-konrad.dybcio@somainline.org


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