media: ir-kbd-i2c: convert to i2c_new_dummy_device()

Convert this driver to use the new i2c_new_dummy_device() call and bail
out if the dummy device cannot be registered to make failure more
visible to the user.

Signed-off-by: Wolfram Sang <[e-mail]>
Signed-off-by: Sean Young <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/i2c/ir-kbd-i2c.c

···
 	INIT_DELAYED_WORK(&ir->work, ir_work);
 
 	if (probe_tx) {
-		ir->tx_c = i2c_new_dummy(client->adapter, 0x70);
-		if (!ir->tx_c) {
+		ir->tx_c = i2c_new_dummy_device(client->adapter, 0x70);
+		if (IS_ERR(ir->tx_c)) {
 			dev_err(&client->dev, "failed to setup tx i2c address");
+			err = PTR_ERR(ir->tx_c);
+			goto err_out_free;
 		} else if (!zilog_init(ir)) {
 			ir->carrier = 38000;
 			ir->duty_cycle = 40;
···
 	return 0;
 
  err_out_free:
-	if (ir->tx_c)
+	if (!IS_ERR(ir->tx_c))
 		i2c_unregister_device(ir->tx_c);
 
 	/* Only frees rc if it were allocated internally */
···
 
 	cancel_delayed_work_sync(&ir->work);
 
-	if (ir->tx_c)
-		i2c_unregister_device(ir->tx_c);
+	i2c_unregister_device(ir->tx_c);
 
 	rc_unregister_device(ir->rc);