dt-bindings: arm: qcom: Document Sony Xperia 1 IV (PDX223)

Document the compatible for the PDX223 device.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220714123406.1919836-1-konrad.dybcio@somainline.org