gpio: mlxbf3: use platform_get_irq_optional()

JIRA: https://issues.redhat.com/browse/RHEL-103570

commit 810bd90
Author: David Thompson <davthompson@nvidia.com>
Date:   Mon Aug 11 13:50:45 2025 -0400

    gpio: mlxbf3: use platform_get_irq_optional()

    The gpio-mlxbf3 driver interfaces with two GPIO controllers,
    device instance 0 and 1. There is a single IRQ resource shared
    between the two controllers, and it is found in the ACPI table for
    device instance 0. The driver should not use platform_get_irq(),
    otherwise this error is logged when probing instance 1:
        mlxbf3_gpio MLNXBF33:01: error -ENXIO: IRQ index 0 not found

    Cc: stable@vger.kernel.org
    Fixes: cd33f21 ("gpio: mlxbf3: Add gpio driver support")
    Signed-off-by: David Thompson <davthompson@nvidia.com>
    Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    Link: https://lore.kernel.org/r/ce70b98a201ce82b9df9aa80ac7a5eeaa2268e52.1754928650.git.davthompson@nvidia.com
    Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

(cherry picked from commit 810bd90)
Signed-off-by: David Thompson <davithom@redhat.com>

Author: David Thompson

drivers/gpio/gpio-mlxbf3.c

@@ -227,7 +227,7 @@ static int mlxbf3_gpio_probe(struct platform_device *pdev)
 	gc->owner = THIS_MODULE;
 	gc->add_pin_ranges = mlxbf3_gpio_add_pin_ranges;
 
-	irq = platform_get_irq(pdev, 0);
+	irq = platform_get_irq_optional(pdev, 0);
 	if (irq >= 0) {
 		girq = &gs->gc.irq;
 		gpio_irq_chip_set_chip(girq, &gpio_mlxbf3_irqchip);