leds: Convert to using %pOF instead of full_name

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <[e-mail]>
Cc: Richard Purdie <[e-mail]>
Cc: [e-mail]
Acked-by: Pavel Machek <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

drivers/leds/leds-is31fl32xx.c

···
 	ret = of_property_read_u32(child, "reg", &reg);
 	if (ret || reg < 1 || reg > led_data->priv->cdef->channels) {
 		dev_err(dev,
-			"Child node %s does not have a valid reg property\n",
-			child->full_name);
+			"Child node %pOF does not have a valid reg property\n",
+			child);
 		return -EINVAL;
 	}
 	led_data->channel = reg;