Not use sub8x8 mv of neighbors in obmc

Take all sub8x8 neighbors as 8x8 blocks and use mv assigned to
the last block.

Change of performance in AWCY
HL improved by 0.01%
LL improved by 0.06%

Change-Id: I55d3c5401222396d871f9157b62b3de29e5390b0
1 file changed