ASoC: Remove export of CS4270 DAI

Not needed with multi-component.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Timur Tabi <timur@freescale.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/cs4270.c

@@ -540,7 +540,6 @@ struct snd_soc_dai_driver cs4270_dai = {
 	},
 	.ops = &cs4270_dai_ops,
 };
-EXPORT_SYMBOL_GPL(cs4270_dai);
 
 /**
  * cs4270_probe - ASoC probe function