This patch against 2.5.51 removes the remaining typedefs from usbvideo

typedef enum { .. } ScanState_t -> enum ScanState
typedef enum { .. } ParseState_t -> enum ParseState
typedef enum { .. } FrameState_t -> enum FrameState
typedef enum { .. } Deinterlace_t -> enum Deinterlace
typedef struct { .. } usbvideo_t -> struct usbvideo