ASoC: Fix device name for AT91SAM9G20-EK devices

A couple of typos in the multi-component conversion.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/atmel/sam9g20_wm8731.c

@@ -183,8 +183,8 @@ static struct snd_soc_dai_link at91sam9g20ek_dai = {
 	.cpu_dai_name = "atmel-ssc-dai.0",
 	.codec_dai_name = "wm8731-hifi",
 	.init = at91sam9g20ek_wm8731_init,
-	.platform_name = "atmel_pcm-audio",
-	.codec_name = "wm8731-codec.0-001a",
+	.platform_name = "atmel-pcm-audio",
+	.codec_name = "wm8731-codec.0-001b",
 	.ops = &at91sam9g20ek_ops,
 };