VP9: block_yrd(): Use RD_COST * instead
VP9: block_yrd(): Use RD_COST * instead

of int *rate, int *dist.

Change-Id: I7cbaea5252615b6b45b33e896f637cf7d076588a

Topopiccione/libvpx,ShiftMediaProject/libvpx,mbebenita/aom,mwgoldsmith/libvpx,webmproject/libvpx,smarter/aom,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,smarter/aom,Topopiccione/libvpx,mbebenita/aom,luctrudeau/aom,mwgoldsmith/vpx,ShiftMediaProject/libvpx,mbebenita/aom,smarter/aom,luctrudeau/aom,mwgoldsmith/libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,smarter/aom,mwgoldsmith/libvpx,mbebenita/aom,webmproject/libvpx,mbebenita/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,luctrudeau/aom,mwgoldsmith/libvpx,webmproject/libvpx,GrokImageCompression/aom,GrokImageCompression/aom,mwgoldsmith/vpx,webmproject/libvpx,Topopiccione/libvpx,mwgoldsmith/libvpx,luctrudeau/aom,mbebenita/aom,mbebenita/aom,GrokImageCompression/aom,luctrudeau/aom,Topopiccione/libvpx,mbebenita/aom,mwgoldsmith/vpx,mwgoldsmith/vpx,GrokImageCompression/aom,mwgoldsmith/libvpx,webmproject/libvpx,Topopiccione/libvpx,mwgoldsmith/vpx,GrokImageCompression/aom,smarter/aom,GrokImageCompression/aom,Topopiccione/libvpx