This removes the rest of the typedefs in rndis.h

The file is now checkpatch.pl clean.

Note, there are a lot of structures in this file that are not used
anywhere.  I don't know if we want to remove them, but I guess they
don't take up any space so it's a nice documentation trail.

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>