Remove a few unneccessary multiplications in denoiser.
Remove a few unneccessary multiplications in denoiser.

Change-Id: I3edbb7cc67203fbbf32c6fd4a08015ca9d9ed53e

kalli123/webm.libvpx,shareefalis/libvpx,goodleixiao/vpx,altogother/webm.libvpx,Maria1099/webm.libvpx,Distrotech/libvpx,ShiftMediaProject/libvpx,openpeer/libvpx_new,mbebenita/aom,shacklettbp/aom,running770/libvpx,ShiftMediaProject/libvpx,felipebetancur/libvpx,webmproject/libvpx,Maria1099/webm.libvpx,stewnorriss/libvpx,Topopiccione/libvpx,shareefalis/libvpx,iniwf/webm.libvpx,openpeer/libvpx_new,reimaginemedia/webm.libvpx,webmproject/libvpx,Acidburn0zzz/webm.libvpx,Distrotech/libvpx,shyamalschandra/libvpx,goodleixiao/vpx,kim42083/webm.libvpx,webmproject/libvpx,kleopatra999/webm.libvpx,mbebenita/aom,zofuthan/libvpx,Topopiccione/libvpx,Suvarna1488/webm.libvpx,gshORTON/webm.libvpx,stewnorriss/libvpx,luctrudeau/aom,mwgoldsmith/libvpx,shyamalschandra/libvpx,thdav/aom,zofuthan/libvpx,zofuthan/libvpx,altogother/webm.libvpx,VTCSecureLLC/libvpx,mwgoldsmith/vpx,jacklicn/webm.libvpx,Suvarna1488/webm.libvpx,jacklicn/webm.libvpx,kim42083/webm.libvpx,jacklicn/webm.libvpx,liqianggao/libvpx,shyamalschandra/libvpx,zofuthan/libvpx,felipebetancur/libvpx,mbebenita/aom,goodleixiao/vpx,kleopatra999/webm.libvpx,jmvalin/aom,VTCSecureLLC/libvpx,matanbs/webm.libvpx,mwgoldsmith/libvpx,Suvarna1488/webm.libvpx,VTCSecureLLC/libvpx,felipebetancur/libvpx,kim42083/webm.libvpx,matanbs/webm.libvpx,ShiftMediaProject/libvpx,Topopiccione/libvpx,altogother/webm.libvpx,goodleixiao/vpx,mwgoldsmith/vpx,running770/libvpx,kalli123/webm.libvpx,reimaginemedia/webm.libvpx,mwgoldsmith/vpx,mwgoldsmith/libvpx,abwiz0086/webm.libvpx,shyamalschandra/libvpx,running770/libvpx,stewnorriss/libvpx,zofuthan/libvpx,matanbs/webm.libvpx,lyx2014/libvpx_c,smarter/aom,reimaginemedia/webm.libvpx,ittiamvpx/libvpx-1,GrokImageCompression/aom,Distrotech/libvpx,luctrudeau/aom,jacklicn/webm.libvpx,reimaginemedia/webm.libvpx,felipebetancur/libvpx,mbebenita/aom,shareefalis/libvpx,Suvarna1488/webm.libvpx,mwgoldsmith/vpx,jmvalin/aom,lyx2014/libvpx_c,ittiamvpx/libvpx-1,kalli123/webm.libvpx,zofuthan/libvpx,mwgoldsmith/libvpx,running770/libvpx,shyamalschandra/libvpx,Acidburn0zzz/webm.libvpx,Suvarna1488/webm.libvpx,mbebenita/aom,matanbs/webm.libvpx,smarter/aom,stewnorriss/libvpx,openpeer/libvpx_new,VTCSecureLLC/libvpx,liqianggao/libvpx,jmvalin/aom,GrokImageCompression/aom,reimaginemedia/webm.libvpx,matanbs/webm.libvpx,thdav/aom,kalli123/webm.libvpx,mbebenita/aom,Topopiccione/libvpx,shacklettbp/aom,gshORTON/webm.libvpx,lyx2014/libvpx_c,Maria1099/webm.libvpx,Topopiccione/libvpx,kleopatra999/webm.libvpx,mwgoldsmith/vpx,kleopatra999/webm.libvpx,smarter/aom,shareefalis/libvpx,altogother/webm.libvpx,kleopatra999/webm.libvpx,webmproject/libvpx,webmproject/libvpx,luctrudeau/aom,shareefalis/libvpx,iniwf/webm.libvpx,shacklettbp/aom,Acidburn0zzz/webm.libvpx,Distrotech/libvpx,mwgoldsmith/libvpx,ittiamvpx/libvpx-1,goodleixiao/vpx,Topopiccione/libvpx,Maria1099/webm.libvpx,iniwf/webm.libvpx,smarter/aom,ShiftMediaProject/libvpx,shareefalis/libvpx,shyamalschandra/libvpx,iniwf/webm.libvpx,Acidburn0zzz/webm.libvpx,jacklicn/webm.libvpx,thdav/aom,ittiamvpx/libvpx-1,shacklettbp/aom,matanbs/webm.libvpx,running770/libvpx,liqianggao/libvpx,Maria1099/webm.libvpx,felipebetancur/libvpx,abwiz0086/webm.libvpx,webmproject/libvpx,gshORTON/webm.libvpx,thdav/aom,luctrudeau/aom,jmvalin/aom,openpeer/libvpx_new,Distrotech/libvpx,GrokImageCompression/aom,GrokImageCompression/aom,kim42083/webm.libvpx,Maria1099/webm.libvpx,abwiz0086/webm.libvpx,jmvalin/aom,Acidburn0zzz/webm.libvpx,liqianggao/libvpx,mbebenita/aom,VTCSecureLLC/libvpx,iniwf/webm.libvpx,ittiamvpx/libvpx-1,mbebenita/aom,GrokImageCompression/aom,kalli123/webm.libvpx,reimaginemedia/webm.libvpx,lyx2014/libvpx_c,Suvarna1488/webm.libvpx,lyx2014/libvpx_c,running770/libvpx,jmvalin/aom,lyx2014/libvpx_c,Acidburn0zzz/webm.libvpx,goodleixiao/vpx,kim42083/webm.libvpx,ittiamvpx/libvpx-1,abwiz0086/webm.libvpx,ShiftMediaProject/libvpx,jacklicn/webm.libvpx,stewnorriss/libvpx,VTCSecureLLC/libvpx,altogother/webm.libvpx,kleopatra999/webm.libvpx,liqianggao/libvpx,GrokImageCompression/aom,stewnorriss/libvpx,gshORTON/webm.libvpx,mbebenita/aom,kim42083/webm.libvpx,luctrudeau/aom,mwgoldsmith/libvpx,smarter/aom,shacklettbp/aom,altogother/webm.libvpx,luctrudeau/aom,smarter/aom,thdav/aom,mwgoldsmith/vpx,openpeer/libvpx_new,abwiz0086/webm.libvpx,abwiz0086/webm.libvpx,felipebetancur/libvpx,shacklettbp/aom,thdav/aom,gshORTON/webm.libvpx,liqianggao/libvpx,iniwf/webm.libvpx,openpeer/libvpx_new,Distrotech/libvpx,kalli123/webm.libvpx,gshORTON/webm.libvpx