arm64: dts: qcom: sm8250-mtp: Add wsa8810 audio codec node

SM8250-MTP has WSA8810 via wsa macro for Speaker playback use case.
Add node for this device to be able to use it for sound card device.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211006164712.16078-4-srinivas.kandagatla@linaro.org