Added support for the Atmel XPLAIN board.

LUFA/Drivers/Board/Buttons.h

@@ -79,10 +79,10 @@
 		#include "STK526/Buttons.h"
 	#elif (BOARD == BOARD_ATAVRUSBRF01)
 		#include "ATAVRUSBRF01/Buttons.h"
-	#elif (BOARD == BOARD_USER)
-		#include "Board/Buttons.h"		
 	#elif (BOARD == BOARD_BUMBLEB)
 		#include "BUMBLEB/Buttons.h"
+	#elif (BOARD == BOARD_USER)
+		#include "Board/Buttons.h"		
 	#else
 		#error The selected board does not contain any GPIO buttons.
 	#endif