gpio: sim: delimit the fwnode name with a ":" when generating labels

Typically, whenever a human-readable name is created for objects using
a software node, its name is delimited with ":" as dashes are often used
in other parts of the name. Make gpio-sim use the same pattern. This
results in better looking default names:

  gpio-sim.0:node0
  gpio-sim.0:node1
  gpio-sim.1:node0
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-sim.c

@@ -421,7 +421,7 @@ static int gpio_sim_add_bank(struct fwnode_handle *swnode, struct device *dev)
 
 	ret = fwnode_property_read_string(swnode, "gpio-sim,label", &label);
 	if (ret) {
-		label = devm_kasprintf(dev, GFP_KERNEL, "%s-%pfwP",
+		label = devm_kasprintf(dev, GFP_KERNEL, "%s:%pfwP",
 				       dev_name(dev), swnode);
 		if (!label)
 			return -ENOMEM;
@@ -836,7 +836,7 @@ static int gpio_sim_add_hogs(struct gpio_sim_device *dev)
 							  GFP_KERNEL);
 			else
 				hog->chip_label = kasprintf(GFP_KERNEL,
-							"gpio-sim.%u-%pfwP",
+							"gpio-sim.%u:%pfwP",
 							dev->id,
 							bank->swnode);
 			if (!hog->chip_label) {