regulator: rt5033: Use linear ranges to map all voltage selection

Instead of linear mapping, Use linear range to map all voltage selection.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/1625553939-9109-1-git-send-email-u0084500@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>