Yet another vp9_pred_common.c cleanup.
Yet another vp9_pred_common.c cleanup.

Change-Id: I617d6c610d181076773c5c3d6f3dbc6717b02580

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