gpio: regmap: Switch to use fwnode instead of of_node

GPIO library now accepts fwnode as a firmware node, so
switch the driver to use it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpio-regmap.c

@@ -244,16 +244,12 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config
 
 	chip = &gpio->gpio_chip;
 	chip->parent = config->parent;
+	chip->fwnode = config->fwnode;
 	chip->base = -1;
 	chip->ngpio = config->ngpio;
 	chip->names = config->names;
 	chip->label = config->label ?: dev_name(config->parent);
 
-#if defined(CONFIG_OF_GPIO)
-	/* gpiolib will use of_node of the parent if chip->of_node is NULL */
-	chip->of_node = to_of_node(config->fwnode);
-#endif /* CONFIG_OF_GPIO */
-
 	/*
 	 * If our regmap is fast_io we should probably set can_sleep to false.
 	 * Right now, the regmap doesn't save this property, nor is there any