dt-bindings: arm: qcom: Document SM6375 & Xperia 10 IV

Add compatibles for Sony Xperia 10 IV (PDX225) and the SM6375 SoC
it's based on.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221107120920.12593-2-konrad.dybcio@linaro.org