The WM8971 is a low power, high quality stereo codec designed for
portable digital audio applications.

This driver was originally written by Kenneth Kiraly.  While out of tree
it has had updates to reflect current kernel APIs and coding standards
from Graeme Gregory and Mark Brown.
Signed-off-by: NKenneth Kiraly <kiraly@lab126.com>
Signed-off-by: NLiam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: NGraeme Gregory <gg@opensource.wolfsonmicro.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>