This patch adds support for the Cirrus Logic CS42448/CS42888 Audio CODEC that
has six/four 24-bit AD and eight 24-bit DA converters.

[ CS42448/CS42888 supports both I2C and SPI control ports. As initial patch,
  this patch only adds the support for I2C. ]
Signed-off-by: NNicolin Chen <Guangyu.Chen@freescale.com>
Acked-by: NBrian Austin <brian.austin@cirrus.com>
Acked-by: NPaul Handrigan <Paul.Handrigan@cirrus.com>
Signed-off-by: NMark Brown <broonie@linaro.org>