Private is a struct member name in mingw-w64 <winioctl.h>, causing this
useless define in a private header to break the build.
Signed-off-by: Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>