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/codecs/wm8978.c

@@ -1038,7 +1038,7 @@ MODULE_DEVICE_TABLE(i2c, wm8978_i2c_id);
 
 static struct i2c_driver wm8978_i2c_driver = {
 	.driver = {
-		.name = "WM8978-codec",
+		.name = "wm8978",
 		.owner = THIS_MODULE,
 	},
 	.probe =    wm8978_i2c_probe,