acpu: show a useful warn message

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
Voltage Control: allow for lower minimums

this allows the low CPU frequencies to take advantage of UV control

modified for HTC one

Signed-off-by: faux123 <reioux@gmail.com>

Signed-off-by: Bryan Smith <zarboz@gmail.com>