More endianness porting of the LUFA device mode class drivers.

Add endianness information to the class driver and core structure definitions.

Move out the unused Ethernet_Frame_Info_t structure definition to the RNDIS device demos where it is needed.

Demos/Device/LowLevel/RNDISEthernet/Lib/Ethernet.h

@@ -81,6 +81,13 @@
 		#define NO_PROCESS                       -1
 
 	/* Type Defines: */
+		/** Type define for an Ethernet frame buffer data and information structure. */
+		typedef struct
+		{
+			uint8_t  FrameData[ETHERNET_FRAME_SIZE_MAX]; /**< Ethernet frame contents. */
+			uint16_t FrameLength; /**< Length in bytes of the Ethernet frame stored in the buffer. */
+		} Ethernet_Frame_Info_t;
+
 		/** Type define for an Ethernet frame header. */
 		typedef struct
 		{