OpenCL : Minor optimization in vp9_choose_partitions kernel
OpenCL : Minor optimization in vp9_choose_partitions kernel

Change-Id: Ib9f4da244f4c04f32841a3bcd5ec54d3761d392c

ittiamvpx/libvpx-1,ittiamvpx/libvpx-1,ittiamvpx/libvpx-1,ittiamvpx/libvpx-1,ittiamvpx/libvpx-1,ittiamvpx/libvpx-1