Make MRC vs native a config rather than making a separate chipset for it.

Tested by making lenovo x230 configurable despite pretty MRC bugs.

Change-Id: Ia2a123f24334f5cd5f42473b7ce7f3d77c0e65b7
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: https://review.coreboot.org/13658
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/northbridge/intel/sandybridge/Makefile.inc b/src/northbridge/intel/sandybridge/Makefile.inc
index 90abe4d..7a3c498 100644
--- a/src/northbridge/intel/sandybridge/Makefile.inc
+++ b/src/northbridge/intel/sandybridge/Makefile.inc
@@ -13,7 +13,7 @@
 # GNU General Public License for more details.
 #
 
-ifeq ($(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE)$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC)$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE)$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_MRC),y)
+ifeq ($(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE)$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE),y)
 
 ramstage-y += ram_calc.c
 ramstage-y += northbridge.c
@@ -25,12 +25,12 @@
 ramstage-y += mrccache.c
 
 romstage-y += ram_calc.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_MRC) += raminit_mrc.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC) += raminit_mrc.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += raminit.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ../../../device/dram/ddr3.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += raminit.c
-romstage-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ../../../device/dram/ddr3.c
+ifeq ($(CONFIG_USE_NATIVE_RAMINIT),y)
+romstage-y += raminit.c
+romstage-y += ../../../device/dram/ddr3.c
+else
+romstage-y += raminit_mrc.c
+endif
 romstage-y += romstage.c
 romstage-y += mrccache.c
 romstage-y += iommu.c