ASoC: ad1980: Return proper error if vendor id mismatch

Return -ENODEV instead of 0 if vendor id mismatch.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/ad1980.c

@@ -200,19 +200,23 @@ static int ad1980_soc_probe(struct snd_soc_codec *codec)
 	}
 
 	/* Read out vendor ID to make sure it is ad1980 */
-	if (ac97_read(codec, AC97_VENDOR_ID1) != 0x4144)
+	if (ac97_read(codec, AC97_VENDOR_ID1) != 0x4144) {
+		ret = -ENODEV;
 		goto reset_err;
+	}
 
 	vendor_id2 = ac97_read(codec, AC97_VENDOR_ID2);
 
 	if (vendor_id2 != 0x5370) {
-		if (vendor_id2 != 0x5374)
+		if (vendor_id2 != 0x5374) {
+			ret = -ENODEV;
 			goto reset_err;
-		else
+		} else {
 			printk(KERN_WARNING "ad1980: "
 				"Found AD1981 - only 2/2 IN/OUT Channels "
 				"supported\n");
 		}
+	}
 
 	/* unmute captures and playbacks volume */
 	ac97_write(codec, AC97_MASTER, 0x0000);