K 10
svn:author
V 4
manu
K 8
svn:date
V 27
2020-01-16T20:52:26.309252Z
K 7
svn:log
V 295
regulator_fixed: Add a get_voltage method

Some consumer cannot know the voltage of the regulator without it.
While here, refuse to attach is min_voltage != max_voltage, it
shouldn't happens anyway.

Reviewed by:	mmel
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D23003

END