Move RNDISConstants.h into the RNDIS class driver common definition header.

Add logical grouping of related #define values for better Doxygen documentation.

LUFA/Drivers/USB/LowLevel/Device.h

@@ -70,6 +70,8 @@
 
 	/* Public Interface - May be used in end-application: */
 		/* Macros: */
+			/** \name USB Device Mode Option Masks */
+			//@{
 			#if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) || defined(__DOXYGEN__)
 				/** Mask for the Options parameter of the \ref USB_Init() function. This indicates that the
 				 *  USB interface should be initialized in low speed (1.5Mb/s) mode.
@@ -87,7 +89,8 @@
 			 *  USB interface should be initialized in full speed (12Mb/s) mode.
 			 */
 			#define USB_DEVICE_OPT_FULLSPEED               (0 << 0)
-
+			//@}
+			
 		/* Function Prototypes: */
 			/** Sends a Remote Wakeup request to the host. This signals to the host that the device should
 			 *  be taken out of suspended mode, and communications should resume.