Implement the I2C control interface for the WM8350. This code was
originally written by Liam Girdwood and has been updated for submission
by Mark Brown.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NSamuel Ortiz <sameo@openedhand.com>
Signed-off-by: NLiam Girdwood <lrg@slimlogic.co.uk>