MEDIA_OBJECT uses hardware scoreboard during VME prediction on Haswell

MEDIA_OBJECT uses hardware scoreboard during VME prediction on Haswell

To get the precise VME prediction the current macroblock will depend on its
neighbour mb(left, top, up-right). So the hardware scoreboard is used
when submitting the MEDIA_OBJECT command. This is to do the preparation
of adding MV prediction in VME prediction.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>