leds: lm36274: Put fwnode in error case during ->probe()

device_get_next_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

In the older code the same is implied with device_for_each_child_node().

Fixes: 11e1bbc116a7 ("leds: lm36274: Introduce the TI LM36274 LED driver")
Fixes: a448fcf19c9c ("leds: lm36274: don't iterate through children since there is only one")
Cc: Dan Murphy <[e-mail]>
Cc: Marek Behún <[e-mail]>
Signed-off-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Pavel Machek <[e-mail]>

drivers/leds/leds-lm36274.c

···
 
 	ret = lm36274_init(chip);
 	if (ret) {
+		fwnode_handle_put(init_data.fwnode);
 		dev_err(chip->dev, "Failed to init the device\n");
 		return ret;
 	}