gpiolib: Use list_first_entry()/list_last_entry()

Use list_first_entry()/list_last_entry() instead of open coded variants.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpiolib.c

@@ -262,14 +262,14 @@ static int gpiodev_add_to_list(struct gpio_device *gdev)
 		return 0;
 	}
 
-	next = list_entry(gpio_devices.next, struct gpio_device, list);
+	next = list_first_entry(&gpio_devices, struct gpio_device, list);
 	if (gdev->base + gdev->ngpio <= next->base) {
 		/* add before first entry */
 		list_add(&gdev->list, &gpio_devices);
 		return 0;
 	}
 
-	prev = list_entry(gpio_devices.prev, struct gpio_device, list);
+	prev = list_last_entry(&gpio_devices, struct gpio_device, list);
 	if (prev->base + prev->ngpio <= gdev->base) {
 		/* add behind last entry */
 		list_add_tail(&gdev->list, &gpio_devices);
@@ -4423,7 +4423,7 @@ static void *gpiolib_seq_next(struct seq_file *s, void *v, loff_t *pos)
 	if (list_is_last(&gdev->list, &gpio_devices))
 		ret = NULL;
 	else
-		ret = list_entry(gdev->list.next, struct gpio_device, list);
+		ret = list_first_entry(&gdev->list, struct gpio_device, list);
 	spin_unlock_irqrestore(&gpio_lock, flags);
 
 	s->private = "\n";