The latest Denim update broke VideoProcessorBlt for Lumia 1520. After
the update, the blit results in a black target texture. As a
workaround, don't use DirectVideo, but leave format conversion and
drawing to the EGL Node.
Task-Id: QTBUG-48331
Change-Id: I1dab6b58d52d0e24fbffb91f23772906a576047a
Reviewed-by: Andrew Knight <andrew.knight@intopalo.com>
f6082d4632