arm64: dts: qcom: Add initial device tree for SM6375

Add an initial device tree for the SM6375 (SD695) SoC.

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/20221107120920.12593-3-konrad.dybcio@linaro.org