Revert "Revert "Revert "serrano: Enable proximity wake option"""

* Sometimes it doesn't work, and it seems to cause various
  issues for some people.

This reverts commit 6c4a5e06726dd9a82e06248b45006c506d7b1a08.

Change-Id: I0249f0a53d166ae4f3b6d2c7a1a1413d1583a7bc
Increase read_ahead_kb to 512

Change-Id: I6daaf4857c0ec78845a26c04bfbcb2ce591864fa
Remove --no_sleep parameter for mpdecision

Change-Id: Id90daae2e3121c1dcbedf1ecdb09d8053422ac64
Disable interactive governors sync_freq feature

Change-Id: I3c8572da7c55fb18511201a875d6fa03fe42818b