ASoC: Intel: bytcht_es8316: Minor refactoring

Some minor refactoring:
1) Group the code setting the card dev and prive pointers together with
   registering the card
2) Properly put the comment about registering the card at the place where
   we actually register the card and add a new comment for getting the clk
3) Add a struct device *dev helper variable (this will be used more in
   follow up commits)
4) Reword error message to have the same "foo failed: %d" wording as others
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bytcht_es8316.c

@@ -237,17 +237,18 @@ static char codec_name[SND_ACPI_I2C_ID_LEN];
 static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev)
 {
 	struct byt_cht_es8316_private *priv;
+	struct device *dev = &pdev->dev;
 	struct snd_soc_acpi_mach *mach;
 	const char *i2c_name = NULL;
 	int dai_index = 0;
 	int i;
 	int ret = 0;
 
-	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	mach = (&pdev->dev)->platform_data;
+	mach = dev->platform_data;
 	/* fix index of codec dai */
 	for (i = 0; i < ARRAY_SIZE(byt_cht_es8316_dais); i++) {
 		if (!strcmp(byt_cht_es8316_dais[i].codec_name,
@@ -265,26 +266,25 @@ static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev)
 		byt_cht_es8316_dais[dai_index].codec_name = codec_name;
 	}
 
-	/* register the soc card */
-	byt_cht_es8316_card.dev = &pdev->dev;
-	snd_soc_card_set_drvdata(&byt_cht_es8316_card, priv);
-
-	priv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
+	/* get the clock */
+	priv->mclk = devm_clk_get(dev, "pmc_plt_clk_3");
 	if (IS_ERR(priv->mclk)) {
 		ret = PTR_ERR(priv->mclk);
-		dev_err(&pdev->dev,
-			"Failed to get MCLK from pmc_plt_clk_3: %d\n",
-			ret);
+		dev_err(dev, "clk_get pmc_plt_clk_3 failed: %d\n", ret);
 		return ret;
 	}
 
-	ret = devm_snd_soc_register_card(&pdev->dev, &byt_cht_es8316_card);
+	/* register the soc card */
+	byt_cht_es8316_card.dev = dev;
+	snd_soc_card_set_drvdata(&byt_cht_es8316_card, priv);
+
+	ret = devm_snd_soc_register_card(dev, &byt_cht_es8316_card);
 	if (ret) {
-		dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
+		dev_err(dev, "snd_soc_register_card failed: %d\n", ret);
 		return ret;
 	}
 	platform_set_drvdata(pdev, &byt_cht_es8316_card);
-	return ret;
+	return 0;
 }
 
 static struct platform_driver snd_byt_cht_es8316_mc_driver = {