cpufreq: Fix broken uevents for cpufreq governor and cpu devices

cyanogens uevent commit when the governor changes was rendered
non-working since kitkat (or so) as the uevent filter function
caused events to be dropped. Now hook into cpufreq_core_init()
and cpufreq_add_dev_interface() to create our basic ksets for
cpufreq and cpu devices. Also, we don't need to set environmental
data, so clean it up a bit.

This commit requires a change in ueventd.rc that add rules for
several files of interest.

Change-Id: I3aafa0d4e18363e1d68535f513099ecd27024007
Revert "cpufreq: Fix broken uevents for cpufreq governor and cpu devices"

This reverts commit 3c4865bd022ca166a6b815754082c9f50759aaa8.
gpu: msm2: Sync to upstream

* Sync with changes done in Google MSM kernel

Change-Id: I38b3d4b41a986dc16097b838afc770e372ddfc7d