cosmetics,dsp/inv_txfm.c: reorder functions
cosmetics,dsp/inv_txfm.c: reorder functions

Change-Id: Ie0f7689ebe230c68eadb22a32b14838c1a7543a6

ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx