ASoC: dt-bindings: q6dsp: add q6apm-lpass-dai compatible

on AudioReach audio Framework access to LPASS ports is via
Q6APM(Audio Process Manager) service, so add a dedicated compatible
string for this.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211026111655.1702-7-srinivas.kandagatla@linaro.org


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