ASoC: cs42xx8: Move the code checking *regmap argument earlier

Slightly improve the readability by moving the code checking *regmap
argument earlier. Also move the assignment of of_id close to the place
testing it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs42xx8.c

@@ -435,16 +435,24 @@ EXPORT_SYMBOL_GPL(cs42xx8_of_match);
 
 int cs42xx8_probe(struct device *dev, struct regmap *regmap)
 {
-	const struct of_device_id *of_id = of_match_device(cs42xx8_of_match, dev);
+	const struct of_device_id *of_id;
 	struct cs42xx8_priv *cs42xx8;
 	int ret, val, i;
 
+	if (IS_ERR(regmap)) {
+		ret = PTR_ERR(regmap);
+		dev_err(dev, "failed to allocate regmap: %d\n", ret);
+		return ret;
+	}
+
 	cs42xx8 = devm_kzalloc(dev, sizeof(*cs42xx8), GFP_KERNEL);
 	if (cs42xx8 == NULL)
 		return -ENOMEM;
 
+	cs42xx8->regmap = regmap;
 	dev_set_drvdata(dev, cs42xx8);
 
+	of_id = of_match_device(cs42xx8_of_match, dev);
 	if (of_id)
 		cs42xx8->drvdata = of_id->data;
 
@@ -482,13 +490,6 @@ int cs42xx8_probe(struct device *dev, struct regmap *regmap)
 	/* Make sure hardware reset done */
 	msleep(5);
 
-	cs42xx8->regmap = regmap;
-	if (IS_ERR(cs42xx8->regmap)) {
-		ret = PTR_ERR(cs42xx8->regmap);
-		dev_err(dev, "failed to allocate regmap: %d\n", ret);
-		goto err_enable;
-	}
-
 	/*
 	 * We haven't marked the chip revision as volatile due to
 	 * sharing a register with the right input volume; explicitly