Remove unnecessary headers:
 - mach/hardware.h in sgtl5000.c
 - linux/i2c.h in sgtl5000.h
Signed-off-by: NZeng Zhaoming <b32542@freescale.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Add Freescale SGTL5000 codec support.
Supported features:
 - line-in and mic input
 - headphone and line-out output
 - line-in bypass ADC and DAC to headphone
 - 16, 20, 24, 32 bit audio
 - 8 ~ 96k sample rates
Signed-off-by: NZeng Zhaoming <zhaoming.zeng@freescale.com>
Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>