VAAPI: codec/avcodec/vaapi.h: fix typo

The function name vlc_va_conn_DestroySurfaces() had a typo.

modules/codec/avcodec/vaapi.h

@@ -63,7 +63,7 @@ static inline VASurfaceID *vlc_va_conn_CreateSurface(vlc_va_conn_t *conn,
     return conn->create_surfaces(conn, width, height, fourcc, num);
 }
 
-static inline void vlc_va_conn_DestorySurfaces(vlc_va_conn_t *conn)
+static inline void vlc_va_conn_DestroySurfaces(vlc_va_conn_t *conn)
 {
     conn->destroy_surfaces(conn);
 }