i9500: Revert commits by @nvflax to current CM state

PS2: Reverted following commits:

1. Revert power add: https://github.com/AICP/device_samsung_i9500/commit/11818b05ed1efd5fa67eea38e7304b8b8cf18f7a
2. Add Power init & Fix wifi: https://github.com/AICP/device_samsung_i9500/commit/6161b509a34bdc591511d52430042db5a0842601


Change-Id: Ib02af2a07de507eab3dea4940d0e9f2aeab06a36