kunimitsu: Add initial FSP2.0 support

Add placeholders for functions required when skylake
uses FSP2.0 driver, keeping the fsp1.1 flow intact.

Change-Id: I5446f8cd093af289e0f6022b53a985fa29e32471
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/16301
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/mainboard/intel/kunimitsu/Makefile.inc b/src/mainboard/intel/kunimitsu/Makefile.inc
index cafa12c..86be420 100644
--- a/src/mainboard/intel/kunimitsu/Makefile.inc
+++ b/src/mainboard/intel/kunimitsu/Makefile.inc
@@ -34,3 +34,7 @@
 ramstage-y += ramstage.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
+
+ifeq ($(CONFIG_PLATFORM_USES_FSP2_0),y)
+romstage-srcs := $(subst $(MAINBOARDDIR)/romstage.c,$(MAINBOARDDIR)/romstage_fsp20.c,$(romstage-srcs))
+endif