i2c_del_slave_device() function

I2C slave device handle that created by `i2c_new_slave_device`.

Initialize an I2C slave device

Set I2C slave event callbacks for I2C slave channel.

Write buffer to hardware fifo. If write length is larger than hardware fifo, then restore in software buffer.

Read bytes from I2C internal buffer. Start a job to receive I2C data.

Write bytes to internal ringbuffer of the I2C slave data. When the TX fifo empty, the ISR will fill the hardware FIFO with the internal ringbuffer's data.