vp9_decodeframe: reorder some functions
vp9_decodeframe: reorder some functions

removes the need for a prototype for the static function
dec_build_inter_predictors_sb

Change-Id: I36580ceae061d27f341ab0a16ece479f92e98004

liqianggao/libvpx,smarter/aom,ShiftMediaProject/libvpx,stewnorriss/libvpx,GrokImageCompression/aom,mbebenita/aom,openpeer/libvpx_new,felipebetancur/libvpx,felipebetancur/libvpx,running770/libvpx,ShiftMediaProject/libvpx,jmvalin/aom,GrokImageCompression/aom,shyamalschandra/libvpx,mwgoldsmith/libvpx,openpeer/libvpx_new,ittiamvpx/libvpx-1,shyamalschandra/libvpx,shyamalschandra/libvpx,mwgoldsmith/vpx,liqianggao/libvpx,webmproject/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/vpx,shacklettbp/aom,Topopiccione/libvpx,VTCSecureLLC/libvpx,Topopiccione/libvpx,liqianggao/libvpx,VTCSecureLLC/libvpx,openpeer/libvpx_new,GrokImageCompression/aom,mbebenita/aom,mbebenita/aom,VTCSecureLLC/libvpx,mwgoldsmith/libvpx,mwgoldsmith/libvpx,running770/libvpx,zofuthan/libvpx,mwgoldsmith/vpx,jmvalin/aom,ShiftMediaProject/libvpx,goodleixiao/vpx,thdav/aom,smarter/aom,shyamalschandra/libvpx,luctrudeau/aom,Topopiccione/libvpx,jmvalin/aom,goodleixiao/vpx,luctrudeau/aom,VTCSecureLLC/libvpx,mwgoldsmith/libvpx,ittiamvpx/libvpx-1,mbebenita/aom,ShiftMediaProject/libvpx,felipebetancur/libvpx,thdav/aom,shacklettbp/aom,luctrudeau/aom,Topopiccione/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,jmvalin/aom,shacklettbp/aom,running770/libvpx,smarter/aom,Topopiccione/libvpx,liqianggao/libvpx,jmvalin/aom,shyamalschandra/libvpx,mwgoldsmith/vpx,liqianggao/libvpx,mbebenita/aom,openpeer/libvpx_new,felipebetancur/libvpx,stewnorriss/libvpx,thdav/aom,thdav/aom,goodleixiao/vpx,liqianggao/libvpx,mbebenita/aom,Topopiccione/libvpx,jmvalin/aom,thdav/aom,goodleixiao/vpx,webmproject/libvpx,running770/libvpx,shacklettbp/aom,webmproject/libvpx,ittiamvpx/libvpx-1,goodleixiao/vpx,webmproject/libvpx,luctrudeau/aom,zofuthan/libvpx,zofuthan/libvpx,mwgoldsmith/libvpx,mwgoldsmith/vpx,shacklettbp/aom,zofuthan/libvpx,shacklettbp/aom,luctrudeau/aom,goodleixiao/vpx,mwgoldsmith/vpx,stewnorriss/libvpx,stewnorriss/libvpx,webmproject/libvpx,mbebenita/aom,smarter/aom,GrokImageCompression/aom,stewnorriss/libvpx,smarter/aom,GrokImageCompression/aom,VTCSecureLLC/libvpx,ittiamvpx/libvpx-1,VTCSecureLLC/libvpx,mbebenita/aom,zofuthan/libvpx,openpeer/libvpx_new,GrokImageCompression/aom,zofuthan/libvpx,thdav/aom,mwgoldsmith/libvpx,running770/libvpx,felipebetancur/libvpx,smarter/aom,ittiamvpx/libvpx-1,stewnorriss/libvpx,shyamalschandra/libvpx,luctrudeau/aom,felipebetancur/libvpx,running770/libvpx,mbebenita/aom,openpeer/libvpx_new