mb/emulation/qemu-i440fx: Select IOAPIC

For SMP operation IOAPIC needs to be configured.

For a build with MAX_CPUS=1 emulation might still decode
the IOAPIC MMIO window, it does not really matter to have
it always reserved.

Change-Id: Ia340fc418cd9ceda56a2a10972e130d9f289c589
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55290
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/emulation/qemu-i440fx/Kconfig

@@ -16,6 +16,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_ASAN_IN_ROMSTAGE
 	select NO_SMM
 	select BOOT_DEVICE_NOT_SPI_FLASH
+	select IOAPIC
 
 config VBOOT
 	select VBOOT_MUST_REQUEST_DISPLAY