arch/x86/ioapic: Select IOAPIC with SMP

For coreboot proper, I/O APIC programming is not really required,
except for the APIC ID field. We generally do not guard the related
set_ioapic_id() or setup_ioapic() calls with CONFIG(IOAPIC).
In practice it's something one cannot leave unselected, but maintain
the Kconfig for the time being.

Change-Id: I6e83efafcf6e81d1dfd433fab1e89024d984cc1f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55291
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/southbridge/amd/agesa/hudson/Kconfig

@@ -10,7 +10,6 @@ if SOUTHBRIDGE_AMD_AGESA_HUDSON || SOUTHBRIDGE_AMD_AGESA_YANGTZE
 
 config SOUTHBRIDGE_SPECIFIC_OPTIONS
 	def_bool y
-	select IOAPIC
 	select HAVE_USBDEBUG_OPTIONS
 	select HAVE_CF9_RESET
 	select HAVE_CF9_RESET_PREPARE

src/southbridge/amd/cimx/sb800/Kconfig

@@ -3,7 +3,6 @@
 config SOUTHBRIDGE_AMD_CIMX_SB800
 	bool
 	default n
-	select IOAPIC
 	select HAVE_USBDEBUG_OPTIONS
 	select AMD_SB_CIMX
 	select HAVE_CF9_RESET

src/southbridge/amd/pi/hudson/Kconfig

@@ -10,7 +10,6 @@ if SOUTHBRIDGE_AMD_PI_AVALON || SOUTHBRIDGE_AMD_PI_KERN
 
 config SOUTHBRIDGE_SPECIFIC_OPTIONS
 	def_bool y
-	select IOAPIC
 	select HAVE_USBDEBUG_OPTIONS
 	select HAVE_CF9_RESET
 	select HAVE_CF9_RESET_PREPARE