The i2c core will clear the clientdata pointer automatically.
We don't have to set the `data' field to NULL in remove() or
if probe() failed anymore.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>