arm64: dts: qcom: msm8996: Disable MDSS and Adreno by default

Disable them by default to allow for booting without a display
and proprietary firmware. Then, enable them on boards that didn't
previously disable them. Hence, this commit brings no functional
difference.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210228130831.203765-6-konrad.dybcio@somainline.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>