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/romstage.c b/src/northbridge/intel/sandybridge/romstage.c
index 04db608..7b367c5 100644
--- a/src/northbridge/intel/sandybridge/romstage.c
+++ b/src/northbridge/intel/sandybridge/romstage.c
@@ -70,8 +70,7 @@
 	mainboard_config_superio();
 
 	/* USB is inited in MRC if MRC is used.  */
-	if (!(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC
-	      || CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE_MRC)) {
+	if (CONFIG_USE_NATIVE_RAMINIT) {
 		early_usb_init(mainboard_usb_ports);
 	}