Revert wait4vsync changes until panel init sequence is fixed.

Revert "msm_fb: display: wait4vsync before set suspend flag"

This reverts commit 1290ad44bf529f8689e19bf1afa475463180a2ae.

Revert "msm_fb: display: wait4vsync after timing generator is turned off"

This reverts commit f34ba26f33aef39836eb250ee953ee96970c4945.

Revert "msm_fb: display: replace msleep with wait4vsync"

This reverts commit 72cf07da01a75bc93f9601269fbc847154b1bbf4.

Change-Id: I9f1b19b49915c1f3f52c986e7d34c173f0459d19