mb/intel/cedarisland_crb: Add dummy mainboard_memory_init_params()

Add a dummy implementation (currently FSP defaults are meant for CRB).
It is needed only to prevent build breakage.

Change-Id: I67b1a693886a29bdaf23f1f3f249da52ba65451a
Signed-off-by: Andrey Petrov <anpetrov@fb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40553
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maxim Polyakov <max.senia.poliak@gmail.com>

src/mainboard/intel/cedarisland_crb/Makefile.inc

@@ -1 +1,2 @@
 bootblock-y += bootblock.c
+romstage-y += romstage.c

src/mainboard/intel/cedarisland_crb/romstage.c

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#include <soc/romstage.h>
+
+void mainboard_memory_init_params(FSPM_UPD *mupd)
+{
+}