mpeg2lg: restore descriptor properties order to fix reg test failure
mpeg2lg: restore descriptor properties order to fix reg test failure

Limecraft/ebu-bmx,xunchangguo/BMX,stuarthicks/bmx,kierank/bmxlib-bmx,stuarthicks/bmx,kierank/bmxlib-bmx,kierank/bmxlib-bmx,xunchangguo/BMX,ebu/ebu-bmx,Limecraft/ebu-bmx,ebu/ebu-bmx,xunchangguo/BMX,ebu/ebu-bmx,stuarthicks/bmx,Limecraft/ebu-bmx