Cleaning up vp9_rc_postencode_update() function.
Cleaning up vp9_rc_postencode_update() function.

Change-Id: I02e44c10660fdb9201a802ad19ceb64756feeebe

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