nb/intel/nehalem: Enabled VBOOT support

Tested on Lenovo T410.

Change-Id: I86100be79bf2337d65b688edba34b87f3ac18cb6
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35454
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/northbridge/intel/nehalem/Kconfig

@@ -24,6 +24,10 @@ config NORTHBRIDGE_INTEL_NEHALEM
 
 if NORTHBRIDGE_INTEL_NEHALEM
 
+config VBOOT
+	select VBOOT_MUST_REQUEST_DISPLAY
+	select VBOOT_STARTS_IN_ROMSTAGE
+
 config MMCONF_BUS_NUMBER
 	int
 	default 256