arm64: dts: qcom: sdm845: Add size/address-cells to dsi[01]

Add the aforementioned properties in the SoC DTSI so that everybody doesn't
have to copy that into their device DTs, effectively reducing code
duplication.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211002001358.45920-5-konrad.dybcio@somainline.org