This was missing until now and the underlying
_regulator_do_set_voltage is using this value when calling list_voltage.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Acked-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>