winioctl.h: Now that classpnp.h is available in the ddk, remove the macros
for the MEDIA_CHANGE_DETECTION_STATE enum and the associated fixme note.


git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@3632 4407c894-4637-0410-b4f5-ada5f102cad1