ASoC: samsung: Make card name for Snow configurable

Snow sound-card driver supports multiple boards with different
audio codecs. Updating the sound card name per board basis would provide
some more information to the end-user.
Signed-off-by: NTushar Behera <tushar.b@samsung.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Documentation/devicetree/bindings/sound/snow.txt

@@ -8,11 +8,15 @@ Required properties:
 - samsung,i2s-controller: The phandle of the Samsung I2S controller
 - samsung,audio-codec: The phandle of the audio codec
 
+Optional:
+- samsung,model: The name of the sound-card
+
 Example:
 
 sound {
 		compatible = "google,snow-audio-max98095";
 
+		samsung,model = "Snow-I2S-MAX98095";
 		samsung,i2s-controller = <&i2s0>;
 		samsung,audio-codec = <&max98095>;
 };

sound/soc/samsung/snow.c

@@ -92,6 +92,9 @@ static int snow_probe(struct platform_device *pdev)
 
 	card->dev = &pdev->dev;
 
+	/* Update card-name if provided through DT, else use default name */
+	snd_soc_of_parse_card_name(card, "samsung,model");
+
 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);