sandy/ivy native: dedup romstage.c main()

Change-Id: I9909a5b2bdb4b59219db6304fa4332802fe0301c
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7127
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
diff --git a/src/northbridge/intel/sandybridge/Makefile.inc b/src/northbridge/intel/sandybridge/Makefile.inc
index 09d6614..0469f0d 100644
--- a/src/northbridge/intel/sandybridge/Makefile.inc
+++ b/src/northbridge/intel/sandybridge/Makefile.inc
@@ -30,8 +30,10 @@
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += raminit.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += raminit.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_NATIVE) += raminit_native.c
+romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_NATIVE) += romstage_native.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_NATIVE) += ../../../device/dram/ddr3.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_NATIVE) += raminit_native.c
+romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_NATIVE) += romstage_native.c
 romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_NATIVE) += ../../../device/dram/ddr3.c
 romstage-y += mrccache.c
 romstage-y += early_init.c