Remove unnecessary bit shifts.
Correct min value to match datasheet.
Num steps = number of steps between min and max.
Reported-by: NRyan Harvey <ryan.harvey@cirrus.com>
Signed-off-by: NRyan Harvey <ryan.harvey@cirrus.com>
Signed-off-by: NBrian Austin <brian.austin@cirrus.com>
Signed-off-by: NMark Brown <broonie@linaro.org>