permissions: remove wide open permissions

p2: change perms tighter.
p3: scaling governor file needs write access for root.
p4: removed need for using /cache (uses /data/local/tmp)

Change-Id: I20489c3a0732622f477145cacc41abf92386a853
Merge remote-tracking branch 'pac/pac-4.4' into pac-4.4
Add CPU Voltage

Support (only UV_mV_table) and add some thread to reduce lagginess
also minor clean up

Change-Id: Iab61385b4e38e0f5e3f94100f08ab95a423e0cdd
Version 1.2

Change-Id: I7d956bc6c7be03cd3152a0919755a7faab4a42f8