dxva2api.idl: Moved dxva2api.h declarations to an IDL file.

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk@5837 4407c894-4637-0410-b4f5-ada5f102cad1
libdxguid.a: Added d3d10 IIDs.

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk@5838 4407c894-4637-0410-b4f5-ada5f102cad1
evr.h: Added some missing GUIDs.

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk@5839 4407c894-4637-0410-b4f5-ada5f102cad1
mfapi.h: Avoid conflict with d3d*types.h headers.

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk@5840 4407c894-4637-0410-b4f5-ada5f102cad1