gpio: altera: Drop .mapped_irq from driver data

struct altera_gpio_chip::mapped_irq is only used in the driver's probe
function. So it's enough if mapped_irq is a local variable, and can be
dropped from driver data.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/20250109090802.3763275-2-u.kleine-koenig@baylibre.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-altera.c

@@ -32,14 +32,12 @@
 *			  will be blocked until the current one completes.
 * @interrupt_trigger	: specifies the hardware configured IRQ trigger type
 *			  (rising, falling, both, high)
-* @mapped_irq		: kernel mapped irq number.
 */
 struct altera_gpio_chip {
 	struct gpio_chip gc;
 	void __iomem *regs;
 	raw_spinlock_t gpio_lock;
 	int interrupt_trigger;
-	int mapped_irq;
 };
 
 static void altera_gpio_irq_unmask(struct irq_data *d)
@@ -235,6 +233,7 @@ static int altera_gpio_probe(struct platform_device *pdev)
 	int reg, ret;
 	struct altera_gpio_chip *altera_gc;
 	struct gpio_irq_chip *girq;
+	int mapped_irq;
 
 	altera_gc = devm_kzalloc(&pdev->dev, sizeof(*altera_gc), GFP_KERNEL);
 	if (!altera_gc)
@@ -271,8 +270,8 @@ static int altera_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(altera_gc->regs))
 		return dev_err_probe(dev, PTR_ERR(altera_gc->regs), "failed to ioremap memory resource\n");
 
-	altera_gc->mapped_irq = platform_get_irq_optional(pdev, 0);
-	if (altera_gc->mapped_irq < 0)
+	mapped_irq = platform_get_irq_optional(pdev, 0);
+	if (mapped_irq < 0)
 		goto skip_irq;
 
 	if (device_property_read_u32(dev, "altr,interrupt-type", &reg)) {
@@ -296,7 +295,7 @@ static int altera_gpio_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	girq->default_type = IRQ_TYPE_NONE;
 	girq->handler = handle_bad_irq;
-	girq->parents[0] = altera_gc->mapped_irq;
+	girq->parents[0] = mapped_irq;
 
 skip_irq:
 	ret = devm_gpiochip_add_data(dev, &altera_gc->gc, altera_gc);