ASoC: Delete ads117x.h

This is not required after multi-component patch.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/ads117x.h

-/*
- * ads117x.h  --  Driver for ads1174/8 ADC chips
- *
- * Copyright 2009 ShotSpotter Inc.
- * Author: Graeme Gregory <gg@slimlogic.co.uk>
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the  License, or (at your
- *  option) any later version.
- */
-extern struct snd_soc_dai_driver ads117x_dai;
-extern struct snd_soc_codec_driver soc_codec_dev_ads117x;