Kconfig: move IOAPIC option to x86 Kconfig

IOAPIC is x86-exclusive, so move the IOAPIC options to arch/x86/Kconfig
file.

Change-Id: Ib0b30a1929f6f4f6bcc6355cce6ceea067905a2c
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91510
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Alicja Michalska <ahplka19@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/Kconfig

@@ -933,18 +933,6 @@ config PCI_IO_CFG_EXT
 	bool
 	default n
 
-config IOAPIC
-	bool
-	default y if SMP
-	default n
-
-config IOAPIC_8BIT_ID
-	bool
-	default n
-	depends on IOAPIC
-	help
-	  Select this option if the hardware support 8bit long IOAPIC IDs.
-
 config USE_WATCHDOG_ON_BOOT
 	bool
 	default n

src/arch/x86/Kconfig

@@ -466,4 +466,16 @@ config SOC_BERT_SIZEOF_ERROR_SECTION
 	help
 	  SoC selects this if it implements soc_bert_sizeof_error_section.
 
+config IOAPIC
+	bool
+	default y if SMP
+	default n
+
+config IOAPIC_8BIT_ID
+	bool
+	default n
+	depends on IOAPIC
+	help
+	  Select this option if the hardware support 8bit long IOAPIC IDs.
+
 endif