We can actually read this back from the device but we use this when
registered using standard I2C board data registration so make sure
it's there for OF too.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>