The LAB and IBB regulator have just one range and it is useless
to use linear_range ops, as these are used to express multiple
linear ranges.

Switch list_voltage and map_voltage callbacks to *_linear instead.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Link: https://lore.kernel.org/r/20210119174421.226541-2-angelogioacchino.delregno@somainline.orgSigned-off-by: Mark Brown <broonie@kernel.org>