intelli-thermal v2: initial adaptation

Intellithermal 2.0 is based on the latest Qualcomm thermal driver adapted for
in-kernel use and control.  Newer MSM8974+ chipsets should use this driver
going forward.

Modifications copyright Paul Reioux 2014

Signed-off-by: Paul Reioux <reioux@gmail.com>
Defconfig: Enable intellithermal v2 by default