i2c: Remove obsolete cleanup for clientdata

A few new i2c-drivers came into the kernel which clear the clientdata-pointer
on exit. This is obsolete meanwhile, so fix it and hope the word will spread.

Signed-off-by: Wolfram Sang <[e-mail]>
Acked-by: Alan Cox <[e-mail]>
Acked-by: Guennadi Liakhovetski <[e-mail]>
Acked-by: Greg Kroah-Hartman <[e-mail]>
Signed-off-by: Jean Delvare <[e-mail]>

drivers/media/video/imx074.c

···
 	ret = imx074_video_probe(icd, client);
 	if (ret < 0) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(priv);
 		return ret;
 	}
···
 	icd->ops = NULL;
 	if (icl->free_bus)
 		icl->free_bus(icl);
-	i2c_set_clientdata(client, NULL);
 	client->driver = NULL;
 	kfree(priv);
 

drivers/media/video/ov6650.c

···
 
 	if (ret) {
 		icd->ops = NULL;
-		i2c_set_clientdata(client, NULL);
 		kfree(priv);
 	}
 
···
 {
 	struct ov6650 *priv = to_ov6650(client);
 
-	i2c_set_clientdata(client, NULL);
 	kfree(priv);
 	return 0;
 }

drivers/misc/apds9802als.c

···
 
 	return res;
 als_error1:
-	i2c_set_clientdata(client, NULL);
 	kfree(data);
 	return res;
 }

drivers/staging/olpc_dcon/olpc_dcon.c

···
  edev:
 	platform_device_unregister(dcon_device);
 	dcon_device = NULL;
-	i2c_set_clientdata(client, NULL);
  eirq:
 	free_irq(DCON_IRQ, &dcon_driver);
  einit:
···
 	if (dcon_device != NULL)
 		platform_device_unregister(dcon_device);
 	cancel_work_sync(&dcon_work);
-
-	i2c_set_clientdata(client, NULL);
 
 	return 0;
 }