Voltage Control: allow for lower minimums

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

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

Conflicts:

	arch/arm/mach-msm/board-m7-regulator.c
cpufreq: OC up to 2.5GHz (Yank555.lu)

- added 2.34GHz, 2.42 GHz and 2.50GHz step
- max. voltage increased from 1100000 to 1200000 microVolt