ASoC: qcom: dt-bindings: Add compatible for DB845c and Lenovo Yoga

This patch adds compatible strings for DB845c and Lenovo Yoga C630
soundcard. Based on this compatible strings common machine driver
will be in better position to setup board specific configuration.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20191219103153.14875-11-srinivas.kandagatla@linaro.org
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/qcom,sdm845.txt

@@ -5,7 +5,10 @@ This binding describes the SDM845 sound card, which uses qdsp for audio.
 - compatible:
 	Usage: required
 	Value type: <stringlist>
-	Definition: must be "qcom,sdm845-sndcard"
+	Definition: must be one of this
+			"qcom,sdm845-sndcard"
+			"qcom,db845c-sndcard"
+			"lenovo,yoga-c630-sndcard"
 
 - audio-routing:
 	Usage: Optional