Revert "msm: mdp: Update sync pt. behaviour"

This reverts commit 0efb816391289a7b27a8530c05202cdd9636bbb0.

This is needed to eliminate "fd 40 returned NULL" (or something like that) errors which occur.

Change-Id: I90ac37d77d41754a8961db7d02dd05de41f37e60