Added enum DEVICE_COUNT and IMAGE_COUNT, Added function device_to_long_string

src/device.h

@@ -28,9 +28,11 @@ enum device {
 	DEVICE_RX_44, /* Nokia N810 */
 	DEVICE_RX_48, /* Nokia N810 WiMax */
 	DEVICE_RX_51, /* Nokia N900 */
+	DEVICE_COUNT,
 };
 
 enum device device_from_string(const char * device);
 const char * device_to_string(enum device device);
+const char * device_to_long_string(enum device device);
 
 #endif