The ADAU1701 has 12 pins that can be configured depending on the system
configuration. Allow settting the corresponding registers from DT.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Acked-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NMark Brown <broonie@linaro.org>