Make nmv_count update 4x8/8x4 aware
Make nmv_count update 4x8/8x4 aware

This commit modifies the vp9_update_nmv_count_ to support rectangular
partition of 8x8 block.

Change-Id: I3e742f80f18f95b031c1c785d756d9365503c24c

ittiamvpx/libvpx,felipebetancur/libvpx,cinema6/libvpx,altogother/webm.libvpx,VTCSecureLLC/libvpx,Acidburn0zzz/webm.libvpx,Maria1099/webm.libvpx,charup/https---github.com-webmproject-libvpx-,jmvalin/aom,stewnorriss/libvpx,iniwf/webm.libvpx,ittiamvpx/libvpx-1,cinema6/libvpx,jdm/libvpx,ShiftMediaProject/libvpx,jacklicn/webm.libvpx,reimaginemedia/webm.libvpx,Distrotech/libvpx,mbebenita/aom,thdav/aom,Maria1099/webm.libvpx,Suvarna1488/webm.libvpx,zofuthan/libvpx,kim42083/webm.libvpx,turbulenz/libvpx,Acidburn0zzz/webm.libvpx,felipebetancur/libvpx,smarter/aom,running770/libvpx,zofuthan/libvpx,jmvalin/aom,mwgoldsmith/vpx,liqianggao/libvpx,kim42083/webm.libvpx,gshORTON/webm.libvpx,jacklicn/webm.libvpx,kim42083/webm.libvpx,matanbs/webm.libvpx,turbulenz/libvpx,shareefalis/libvpx,lyx2014/libvpx_c,ShiftMediaProject/libvpx,mwgoldsmith/vpx,shacklettbp/aom,abwiz0086/webm.libvpx,felipebetancur/libvpx,felipebetancur/libvpx,shyamalschandra/libvpx,Topopiccione/libvpx,shareefalis/libvpx,lyx2014/libvpx_c,openpeer/libvpx_new,openpeer/libvpx_new,mwgoldsmith/libvpx,Suvarna1488/webm.libvpx,thdav/aom,shacklettbp/aom,mbebenita/aom,liqianggao/libvpx,shyamalschandra/libvpx,openpeer/libvpx_new,hsueceumd/test_hui,reimaginemedia/webm.libvpx,goodleixiao/vpx,shyamalschandra/libvpx,matanbs/vp982,ittiamvpx/libvpx,iniwf/webm.libvpx,GrokImageCompression/aom,VTCSecureLLC/libvpx,mwgoldsmith/libvpx,kalli123/webm.libvpx,Acidburn0zzz/webm.libvpx,liqianggao/libvpx,Topopiccione/libvpx,kalli123/webm.libvpx,running770/libvpx,kim42083/webm.libvpx,VTCSecureLLC/libvpx,Suvarna1488/webm.libvpx,matanbs/vp982,reimaginemedia/webm.libvpx,WebRTC-Labs/libvpx,mwgoldsmith/vpx,shareefalis/libvpx,openpeer/libvpx_new,WebRTC-Labs/libvpx,iniwf/webm.libvpx,cinema6/libvpx,VTCSecureLLC/libvpx,webmproject/libvpx,smarter/aom,kalli123/webm.libvpx,Distrotech/libvpx,matanbs/webm.libvpx,jdm/libvpx,n4t/libvpx,n4t/libvpx,webmproject/libvpx,altogother/webm.libvpx,charup/https---github.com-webmproject-libvpx-,zofuthan/libvpx,stewnorriss/libvpx,matanbs/vp982,liqianggao/libvpx,reimaginemedia/webm.libvpx,reimaginemedia/webm.libvpx,mbebenita/aom,charup/https---github.com-webmproject-libvpx-,lyx2014/libvpx_c,GrokImageCompression/aom,turbulenz/libvpx,jdm/libvpx,matanbs/webm.libvpx,Topopiccione/libvpx,abwiz0086/webm.libvpx,thdav/aom,abwiz0086/webm.libvpx,cinema6/libvpx,Maria1099/webm.libvpx,ittiamvpx/libvpx,sanyaade-teachings/libvpx,reimaginemedia/webm.libvpx,turbulenz/libvpx,iniwf/webm.libvpx,turbulenz/libvpx,smarter/aom,felipebetancur/libvpx,zofuthan/libvpx,iniwf/webm.libvpx,cinema6/libvpx,jacklicn/webm.libvpx,altogother/webm.libvpx,pcwalton/libvpx,shacklettbp/aom,ittiamvpx/libvpx-1,sanyaade-teachings/libvpx,webmproject/libvpx,jacklicn/webm.libvpx,mbebenita/aom,kleopatra999/webm.libvpx,sanyaade-teachings/libvpx,sanyaade-teachings/libvpx,hsueceumd/test_hui,webmproject/libvpx,Laknot/libvpx,altogother/webm.libvpx,jdm/libvpx,mbebenita/aom,kleopatra999/webm.libvpx,kalli123/webm.libvpx,cinema6/libvpx,charup/https---github.com-webmproject-libvpx-,jmvalin/aom,gshORTON/webm.libvpx,zofuthan/libvpx,stewnorriss/libvpx,ShiftMediaProject/libvpx,matanbs/webm.libvpx,GrokImageCompression/aom,abwiz0086/webm.libvpx,charup/https---github.com-webmproject-libvpx-,iniwf/webm.libvpx,hsueceumd/test_hui,thdav/aom,Acidburn0zzz/webm.libvpx,altogother/webm.libvpx,thdav/aom,webmproject/libvpx,zofuthan/libvpx,gshORTON/webm.libvpx,openpeer/libvpx_new,GrokImageCompression/aom,openpeer/libvpx_new,ittiamvpx/libvpx-1,turbulenz/libvpx,GrokImageCompression/aom,luctrudeau/aom,mbebenita/aom,turbulenz/libvpx,jacklicn/webm.libvpx,sanyaade-teachings/libvpx,goodleixiao/vpx,kim42083/webm.libvpx,kalli123/webm.libvpx,running770/libvpx,pcwalton/libvpx,Maria1099/webm.libvpx,shacklettbp/aom,ittiamvpx/libvpx,kleopatra999/webm.libvpx,turbulenz/libvpx,pcwalton/libvpx,shareefalis/libvpx,jmvalin/aom,Distrotech/libvpx,gshORTON/webm.libvpx,goodleixiao/vpx,mbebenita/aom,smarter/aom,Distrotech/libvpx,Suvarna1488/webm.libvpx,Acidburn0zzz/webm.libvpx,kalli123/webm.libvpx,luctrudeau/aom,jdm/libvpx,ittiamvpx/libvpx-1,matanbs/vp982,running770/libvpx,Topopiccione/libvpx,shyamalschandra/libvpx,Acidburn0zzz/webm.libvpx,shacklettbp/aom,matanbs/vp982,matanbs/vp982,Topopiccione/libvpx,mwgoldsmith/libvpx,WebRTC-Labs/libvpx,goodleixiao/vpx,running770/libvpx,abwiz0086/webm.libvpx,stewnorriss/libvpx,ittiamvpx/libvpx,WebRTC-Labs/libvpx,pcwalton/libvpx,jdm/libvpx,Laknot/libvpx,goodleixiao/vpx,altogother/webm.libvpx,jmvalin/aom,ShiftMediaProject/libvpx,Maria1099/webm.libvpx,pcwalton/libvpx,matanbs/webm.libvpx,VTCSecureLLC/libvpx,webmproject/libvpx,thdav/aom,WebRTC-Labs/libvpx,gshORTON/webm.libvpx,smarter/aom,liqianggao/libvpx,Laknot/libvpx,ittiamvpx/libvpx-1,Suvarna1488/webm.libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,kleopatra999/webm.libvpx,mbebenita/aom,ittiamvpx/libvpx,mwgoldsmith/libvpx,hsueceumd/test_hui,Topopiccione/libvpx,mwgoldsmith/vpx,kleopatra999/webm.libvpx,kim42083/webm.libvpx,lyx2014/libvpx_c,charup/https---github.com-webmproject-libvpx-,luctrudea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