vp9_svc_layercontext.c: relocate a macro definition
vp9_svc_layercontext.c: relocate a macro definition

move SMALL_FRAME_FB_IDX closer to its first use. this is only used with
CONFIG_SPATIAL_SVC.

Change-Id: Ibf2b3e59a3aab2be2c3b3f89b4380ebe272e0ed6

mbebenita/aom,ittiamvpx/libvpx-1,mbebenita/aom,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/libvpx,mbebenita/aom,mwgoldsmith/libvpx,ShiftMediaProject/libvpx,mbebenita/aom,mwgoldsmith/libvpx,smarter/aom,smarter/aom,mwgoldsmith/libvpx,smarter/aom,GrokImageCompression/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom,Topopiccione/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ittiamvpx/libvpx-1,webmproject/libvpx,webmproject/libvpx,mbebenita/aom,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,GrokImageCompression/aom,mwgoldsmith/vpx,luctrudeau/aom,Topopiccione/libvpx,GrokImageCompression/aom,ittiamvpx/libvpx-1,mwgoldsmith/vpx,Topopiccione/libvpx,GrokImageCompression/aom,webmproject/libvpx,Topopiccione/libvpx,mwgoldsmith/vpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,Topopiccione/libvpx,luctrudeau/aom,mwgoldsmith/vpx,mbebenita/aom,luctrudeau/aom,Topopiccione/libvpx,mwgoldsmith/vpx,smarter/aom,mbebenita/aom,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,mbebenita/aom,mwgoldsmith/libvpx,luctrudeau/aom,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom,mwgoldsmith/vpx