nb/intel/x4x: Select LAPIC_MONOTONIC_TIMER

Needed for coreboot spi driver.

Change-Id: I01059c8cbdc6a002dfd75b6da3a629811b137702
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/21320
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/northbridge/intel/x4x/Kconfig

@@ -22,6 +22,7 @@ if NORTHBRIDGE_INTEL_X4X
 config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
 	def_bool y
 	select HAVE_DEBUG_RAM_SETUP
+	select LAPIC_MONOTONIC_TIMER
 	select VGA
 	select INTEL_GMA_ACPI
 	select RELOCATABLE_RAMSTAGE