Revert "SurfaceFlinger: Change to support framebuffer flip for 2D blitters"

This reverts commit 4f089f8886cf1d9ef5e88a8d471d8785adf6365e, which
causes crashes on passion (Nexus One)

Thanks to spezi77 for finding it, and parkedraccoon for telling me about
it.  I'm making this fork to be sure I have a clean matching
stable/cm-11.0 fork with the rest of my build.

Conflicts:
	services/surfaceflinger/DisplayHardware/HWComposer.cpp

Change-Id: I143e0d46ce899abf4afd5a2551d5f9255f743006