Revert "msm_fb : Avoid wait for vsync when Timing Generator is off"

This reverts commit 2045261de3d6b54bd127c3513906a874eaa6e5f7.
Squashed update of kernel from 3.0.72 to 3.0.73
Merge branch 'cm-10.1' of https://github.com/arco/samsung-kernel-msm7x30 into jb4.2_krisli