gpio: twl4030: use devm_irq_alloc_descs()

This driver never frees the irq descriptors it allocates. Fix it by
using a resource managed variant of irq_alloc_descs().
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-twl4030.c

@@ -485,7 +485,8 @@ static int gpio_twl4030_probe(struct platform_device *pdev)
 		goto no_irqs;
 	}
 
-	irq_base = irq_alloc_descs(-1, 0, TWL4030_GPIO_MAX, 0);
+	irq_base = devm_irq_alloc_descs(&pdev->dev, -1,
+					0, TWL4030_GPIO_MAX, 0);
 	if (irq_base < 0) {
 		dev_err(&pdev->dev, "Failed to alloc irq_descs\n");
 		return irq_base;