GPU: fix OC 887,5MHz
bring back voltage control

Change-Id: I35aa65c9b39a090f04e405c08c5a5a4422c9924f
gpu:rework gpu freqs, add two more  steps (450, 400), thanks @tbalden

Change-Id: Ie821a27ec4d55e3bc225995d38fb2d2328d51162
Revert "gpu:rework gpu freqs, add two more  steps (450, 400), thanks @tbalden"

This reverts commit cf8a45b6b978156b4f898fbb9885142f902c14c1.
Revert "GPU: fix OC 887,5MHz"

This reverts commit 08f563eea0c179aca04f44335f8c170d6cbd74b6.
revert GPU complete to stock
bring back init gpu oc
gpu adjustments
switch to new gpu oc implementation thanks @ktoonsez and @flar2

Change-Id: I02de1e718c1033f7dd7f2ff07a965f85d04a179c
adjusting GPU overclock
fix build after applying gpu oc patch over pll