Add file-level brief documentation.

Remove accidentally duplicated model-specific peripheral driver files.

LUFA/Drivers/USB/Class/Common/RNDISConstants.h

@@ -28,6 +28,13 @@
   this software.
 */
 
+/** \file
+ *  \brief Common RNDIS class constant definitions.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the class driver
+ *        dispatch header located in LUFA/Drivers/USB/Class/Audio.h.
+ */
+
 /** \file
  *
  *  RNDIS specification related constants. For more information on these