saa7164_i2c_unregister
saa7164_i2c_unregister(&dev->i2c_bus[0]);
saa7164_i2c_unregister(&dev->i2c_bus[1]);
saa7164_i2c_unregister(&dev->i2c_bus[2]);
extern int saa7164_i2c_unregister(struct saa7164_i2c *bus);