ASoC: dt-bindings: wsa883x: Document port mapping property

Document port mapping property for wsa883x. Port mapping is required
to be able map correct master ports for VI feedback.

All the device ports are not mapped in same order as master ports, so
there is a need for having static port mapping for WSA codecs.

Signed-off-by: Manikantan R <quic_manrav@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://patch.msgid.link/20240626-port-map-v2-1-6cc1c5608cdd@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>