arm64: dts: qcom: sm8250-mtp: add sound card support

This patch adds sound card support for MTP using WCD938x headset playback,
capture, WSA8810 Speaker Playback and DMICs via VA macro.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211006164712.16078-5-srinivas.kandagatla@linaro.org