gpio: lpc18xx: select GPIOLIB_IRQCHIP

This driver uses gpiochip_irq_reqres() and gpiochip_irq_relres() which
are only built with GPIOLIB_IRQCHIP=y. Add the missing Kconfig select.

Fixes: 289e42d ("gpio: lpc18xx: Make irq_chip immutable")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20250522-gpio-fix-v1-3-98ceae7c4c3c@nxp.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: MrVan

drivers/gpio/Kconfig

@@ -438,6 +438,7 @@ config GPIO_LPC18XX
 	default y if ARCH_LPC18XX
 	depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
 	select IRQ_DOMAIN_HIERARCHY
+	select GPIOLIB_IRQCHIP
 	help
 	  Select this option to enable GPIO driver for
 	  NXP LPC18XX/43XX devices.