Revert "camera: Fix the flash sync issue in CAF mode"

This reverts commit 0be4d675df0654f1b55f0f516893b8cc6f696f56.
Can lead to freeze/reboot if flash ON
and not touching to Focus

Change-Id: Ia7b556dabde2f515c9f99abd408e9f7359f44cd1
Merge remote-tracking branch upstream/cm-10.2 into dark-jelly-cm-10.2:

Conflicts:

camera/QCameraHWI.cpp

Change-Id: I96e264d9fe2acac5d82548f659efc57f24508be7