arm64: dts: qcom: Add base SM8450 QRD DTS

Add DTS for Qualcomm QRD platform which uses SM8450 SoC and mark the
reserved nodes.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211215043440.605624-6-vkoul@kernel.org