sb/lynxpoint: use hda_verb.c from VARIANT_DIR if applicable

Change-Id: Ie2d0cf573876694fe87edf2f6915a5cc26238940
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/17453
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/southbridge/intel/lynxpoint/Makefile.inc b/src/southbridge/intel/lynxpoint/Makefile.inc
index e36b1b2..3ecc6a6 100644
--- a/src/southbridge/intel/lynxpoint/Makefile.inc
+++ b/src/southbridge/intel/lynxpoint/Makefile.inc
@@ -28,7 +28,11 @@
 ramstage-y += hda_verb.c
 ramstage-$(CONFIG_INTEL_LYNXPOINT_LP) += serialio.c
 
+ifneq ($(CONFIG_VARIANT_DIR),)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/hda_verb.c
+else
 ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/hda_verb.c
+endif
 
 ramstage-y += rcba.c
 ramstage-y += me_status.c