HID: cp2112: Don't call ->to_irq() explicitly

GPIO library guarantees that ->to_irq() is always exists.
Moreover, it tending to become a nische thingy and has to
not be used in ordinary drivers. Hence, replace that by
irq_find_mapping().

Signed-off-by: Andy Shevchenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Benjamin Tissoires <[email protected]>

Author: andy-shev

drivers/hid/hid-cp2112.c

@@ -1112,10 +1112,9 @@ static void cp2112_gpio_poll_callback(struct work_struct *work)
 
 	gpio_mask = ret;
 	for_each_set_bit(virq, &dev->irq_mask, 8) {
-		if (!dev->gc.to_irq)
-			break;
-
-		irq = dev->gc.to_irq(&dev->gc, virq);
+		irq = irq_find_mapping(dev->gc.irq.domain, virq);
+		if (!irq)
+			continue;
 
 		d = irq_get_irq_data(irq);
 		if (!d)