Revert "irqchip/dw-apb-ictl: Support building as module"

This reverts commit 7cc4f309c933ec5d64eea31066fe86bbf9e48819.

Causes build fails.

Reported-by: Mark Brown <[e-mail]>
Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: Jisheng Zhang <[e-mail]>
https://lore.kernel.org/oe-kbuild-all/[e-mail]/

drivers/irqchip/Kconfig

···
 	select IRQ_DOMAIN
 
 config DW_APB_ICTL
-	tristate "DesignWare APB Interrupt Controller"
+	bool
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN_HIERARCHY
 

drivers/irqchip/irq-dw-apb-ictl.c

···
 	int ret, nrirqs, parent_irq, i;
 	u32 reg;
 
-	if (!parent && IS_BUILTIN(CONFIG_DW_APB_ICTL)) {
+	if (!parent) {
 		/* Used as the primary interrupt controller */
 		parent_irq = 0;
 		domain_ops = &dw_apb_ictl_irq_domain_ops;
···
 	release_mem_region(r.start, resource_size(&r));
 	return ret;
 }
-#if IS_BUILTIN(CONFIG_DW_APB_ICTL)
-IRQCHIP_DECLARE(dw_apb_ictl, "snps,dw-apb-ictl", dw_apb_ictl_init);
-#else
-IRQCHIP_PLATFORM_DRIVER_BEGIN(dw_apb_ictl)
-IRQCHIP_MATCH("snps,dw-apb-ictl", dw_apb_ictl_init)
-IRQCHIP_PLATFORM_DRIVER_END(dw_apb_ictl)
-MODULE_DESCRIPTION("DesignWare APB Interrupt Controller");
-MODULE_LICENSE("GPL v2");
-#endif
+IRQCHIP_DECLARE(dw_apb_ictl,
+		"snps,dw-apb-ictl", dw_apb_ictl_init);