Small re-arrangement.
Small re-arrangement.

Move initialization of a some new "twopass" values
to the function vp9_init_second_pass() and some other
small  changes.

Remove #if GROUP_ADAPTIVE_MAXQ as this is always
enabled now.

Change-Id: I1dbec2fd7c419779848aa987c4cd7824d4df8456

luctrudeau/aom,GrokImageCompression/aom,GrokImageCompression/aom,mbebenita/aom,ShiftMediaProject/libvpx,Topopiccione/libvpx,Topopiccione/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/libvpx,mwgoldsmith/vpx,mwgoldsmith/libvpx,ShiftMediaProject/libvpx,Topopiccione/libvpx,luctrudeau/aom,Topopiccione/libvpx,mwgoldsmith/libvpx,GrokImageCompression/aom,mwgoldsmith/vpx,smarter/aom,ShiftMediaProject/libvpx,luctrudeau/aom,webmproject/libvpx,mwgoldsmith/libvpx,webmproject/libvpx,mwgoldsmith/libvpx,mbebenita/aom,mbebenita/aom,Topopiccione/libvpx,webmproject/libvpx,mbebenita/aom,ShiftMediaProject/libvpx,mbebenita/aom,mbebenita/aom,mwgoldsmith/libvpx,mbebenita/aom,mwgoldsmith/vpx,luctrudeau/aom,GrokImageCompression/aom,GrokImageCompression/aom,webmproject/libvpx,luctrudeau/aom,Topopiccione/libvpx,smarter/aom,smarter/aom,webmproject/libvpx,luctrudeau/aom,smarter/aom,webmproject/libvpx,mbebenita/aom,GrokImageCompression/aom,smarter/aom,mwgoldsmith/vpx,mwgoldsmith/vpx,mbebenita/aom,smarter/aom,mwgoldsmith/vpx