Add new RNDIS_Host_IsPacketReceived(), RNDIS_Device_ReadPacket() and RNDIS_Device_WritePacket() functions to the Device RNDIS Class Driver.

Modify RNDIS demos to suit the simplified Ethernet_Frame_Info_t structure.

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

@@ -100,7 +100,6 @@ void Ethernet_ProcessPacket(void)
 
 			/* Set the response length in the buffer and indicate that a response is ready to be sent */
 			FrameOUT.FrameLength            = (sizeof(Ethernet_Frame_Header_t) + RetSize);
-			FrameOUT.FrameInBuffer          = true;
 		}
 	}
 
@@ -108,7 +107,7 @@ void Ethernet_ProcessPacket(void)
 	if (RetSize != NO_PROCESS)
 	{
 		/* Clear the frame buffer */
-		FrameIN.FrameInBuffer = false;
+		FrameIN.FrameLength = 0;
 	}
 }