arm64: dts: qcom: sm8550-mtp: add sound card

Add the sound card node with tested playback over WSA8845 speakers and
WCD9385 headset over USB Type-C.  The recording links were not tested,
but should be similar to previous platforms.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230612173758.286411-2-krzysztof.kozlowski@linaro.org