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 changes from CyanogenMod 10.2 into local branch