arm64: dts: qcom: sdm845-tama: Add display nodes

Add required nodes to support display on XZ2/XZ2c. XZ3 has a
different power rail setup and needs to be handled separately.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230313-topic-tama_disp-v3-1-2b1567c039d7@linaro.org