Starting from SM8550, the TX ADC input soundwire port is offset by 1,
and uses the new SWR_INPUTx input ports, so replace the legacy
SWR_ADCx routes for SWR_INPUT0 & SWR_INPUT1 following the correct
TX Soundwire port mapping.

Add some comments on the routing for clarity.

Fixes: b5e25ded ("arm64: dts: qcom: sm8550: add support for the SM8550-HDK board")
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240201-topic-sm8550-hdk8550-audio-fix-v1-1-aa526c9c91d5@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>