arm64: dts: qcom: sm8550: add Soundwire controllers

Add nodes for LPASS Soundwire v2.0.0 controllers.  Use labels with
indices matching downstream DTS, to make any comparisons easier.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230405061129.143553-1-krzysztof.kozlowski@linaro.org