Instead, create files that #include mga_vid.c/radeon_vid.c with the proper
#defines set. This has the added benefit of fixing dependency generation,
which only works for existing .c files.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25589 b3059339-0415-0410-9bf9-f77b7e298cf2