ASoC: Fix WM8978/migor driver name conflict

Standardise on 'wm8978' as the name for the CODEC.

Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/sh/migor.c

@@ -156,7 +156,7 @@ static struct snd_soc_dai_link migor_dai = {
 	.cpu_dai_name = "siu-i2s-dai",
 	.codec_dai_name = "wm8978-hifi",
 	.platform_name = "siu-pcm-audio",
-	.codec_name = "wm8978-codec.0-001a",
+	.codec_name = "wm8978.0-001a",
 	.ops = &migor_dai_ops,
 	.init = migor_dai_init,
 };