hammerhead: Use QCOM PowerHAL

Change-Id: Ia40f84d2eb511dd1c7c0521706422ddf68e51342
hammerhead: Update build fingerprint and description to KTU84P

Change-Id: Idf7b0bf26acddc7333ce23322be468473c4fc626
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_lge_hammerhead into temp