gpio: xlp: use resource management for irqs

Use the resource managed variant of irq_alloc_descs() and remove the
code manually freeing allocated interrupt descriptors.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-xlp.c

@@ -404,7 +404,9 @@ static int xlp_gpio_probe(struct platform_device *pdev)
 
 	/* XLP(MIPS) has fixed range for GPIO IRQs, Vulcan(ARM64) does not */
 	if (soc_type != GPIO_VARIANT_VULCAN) {
-		irq_base = irq_alloc_descs(-1, XLP_GPIO_IRQ_BASE, gc->ngpio, 0);
+		irq_base = devm_irq_alloc_descs(&pdev->dev, -1,
+						XLP_GPIO_IRQ_BASE,
+						gc->ngpio, 0);
 		if (irq_base < 0) {
 			dev_err(&pdev->dev, "Failed to allocate IRQ numbers\n");
 			return irq_base;
@@ -415,7 +417,7 @@ static int xlp_gpio_probe(struct platform_device *pdev)
 
 	err = gpiochip_add_data(gc, priv);
 	if (err < 0)
-		goto out_free_desc;
+		return err;
 
 	err = gpiochip_irqchip_add(gc, &xlp_gpio_irq_chip, irq_base,
 				handle_level_irq, IRQ_TYPE_NONE);
@@ -433,8 +435,6 @@ static int xlp_gpio_probe(struct platform_device *pdev)
 
 out_gpio_remove:
 	gpiochip_remove(gc);
-out_free_desc:
-	irq_free_descs(irq_base, gc->ngpio);
 	return err;
 }