Voltage Control: generic voltage control for DTS based kernels

Signed-off-by: Paul Reioux <reioux@gmail.com>
Voltage Control: Fix voltage setting bug
Voltage Control: adapted for the new devfreq drivers
Voltage Control: fix some errors with vars
defconfig: enable voltage table

allows users to OV/UV
msm: remote_spinlock: swp{b} is deprecated for ARM>v5
msm: thermal: Check temperature only if probed

This avoids a (harmless) error:

<3>[    0.214144] msm_thermal:msm_thermal_get_freq_table error reading cpufreq table

Change-Id: Ibf8e319751edb49e836b2e207c0075f60b71f44a