gpio: dwapb: Discard ACPI GPIO-chip IRQs request

Since GPIOlib-based IRQ-chip interface is now utilized there is no need
in calling the methods acpi_gpiochip_{request,free}_interrupts() here.
They will be called from gpiochip_add_irqchip()/gpiochip_irqchip_remove()
anyway.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-8-Sergey.Semin@baikalelectronics.ruSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-dwapb.c

@@ -526,9 +526,6 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
 		return err;
 	}
 
-	/* Add GPIO-signaled ACPI event support */
-	acpi_gpiochip_request_interrupts(&port->gc);
-
 	port->is_registered = true;
 
 	return 0;
@@ -544,7 +541,6 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
 		if (!port->is_registered)
 			continue;
 
-		acpi_gpiochip_free_interrupts(&port->gc);
 		gpiochip_remove(&port->gc);
 	}
 }