cpu/intel/haswell: Switch to POSTCAR_STAGE

Tested on Google Peppy (Acer C720).

Change-Id: I1802547d7a5b3875689cc4e126e7c189a75defa9
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/26793
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/haswell/Kconfig b/src/northbridge/intel/haswell/Kconfig
index 5c8caea..5e6956e 100644
--- a/src/northbridge/intel/haswell/Kconfig
+++ b/src/northbridge/intel/haswell/Kconfig
@@ -21,6 +21,8 @@
 	select INTEL_GMA_ACPI
 	select RELOCATABLE_RAMSTAGE
 	select CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM
+	select POSTCAR_STAGE
+	select POSTCAR_CONSOLE
 
 if NORTHBRIDGE_INTEL_HASWELL
 
diff --git a/src/northbridge/intel/haswell/Makefile.inc b/src/northbridge/intel/haswell/Makefile.inc
index c6d6b2e..055c2a8 100644
--- a/src/northbridge/intel/haswell/Makefile.inc
+++ b/src/northbridge/intel/haswell/Makefile.inc
@@ -36,4 +36,6 @@
 mrc.bin-position := 0xfffa0000
 mrc.bin-type := mrc
 
+postcar-y += ram_calc.c
+
 endif