Revert "Voltage Control: add sysfs interface"

This reverts commit 78513caaaafc13290589c81147b2cad18738a4b6.
Revert "Voltage Control: initial voltage control for MSM S4-Pro SOC"

This reverts commit 6a287fa744dbcfe8fdf79e8795f6b567be11e8a7.

Conflicts:

	arch/arm/mach-msm/Kconfig
Mako (absolute) Voltage control.

This started out as just including the existing work of someone else.
But that was so obfuscated and needlessly moved in sysfs, i turned it into the type control
we have on NP, meaning same sysfs location and output formatting.
Since the various kernels range from no preUV to different levels of UV it is best to encourage the user
to think in absolute voltages.
"I can UV -150 on kernel X! Really? Odd, i can only UV kernel Y -50mV!"
Kernel X has no preUV, kernel Y has 100mV preUV, so they both run the same.
This is needlessly confusing to users.

Talking in absolutes, users will get a better understanding of "what the other guy's" device is capable of.
Sticking to a common sysfs location and to the common absolute voltage is thus the right thing to do.

This seems to work now as it should.

This is heavily based on coolbho3k's NP patch. from Paul's mess we might have a few function names, but not the contents.
This is not his, if he claims otherwise, he can go fuck himself.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>

Conflicts:

	arch/arm/mach-msm/Kconfig
Undervolt: clean it up, make it elegant and remove the constrain of fixed set of NUM_FREQS - its not dynamic based on the number of freqs used for scaling via an external function.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Undervolt: few minor changes, mostly for clarity.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Undervolt: add checks to disallow too extreme voltages, min and max.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cpufreq: conservative: tune for performance.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>