hh: Update power config

 * Disable cpubw_hwmon and use the standard msm_cpufreq governor. 8974v2
   is not ready for this and performance is lower.
 * Adjust paths for lpm_levels driver.

Change-Id: I1b8e0b1fae8a22b8585563c03345d9ffd0454f4f
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_lge_hammerhead into cd-4.4