The max voltage will be bounded by min_uV, uV_step and n_voltages, so
remove it to avoid confusing.
Signed-off-by: NYunfan Zhang <yfzhang@marvell.com>
Reviewed-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>