drivers/intel/fsp2_0: move common cbmem_top_chipset to fsp driver

The common cbmem_top_chipset implementation uses the FSP bootloader HOB,
thus move it to the fsp driver which is a more appropriate place.

Change-Id: I914df51a7414eb72416f816ff8375a13d5716925
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36620
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: David Guckian
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/intel/fsp2_0/Makefile.inc

@@ -22,6 +22,7 @@ romstage-$(CONFIG_VERIFY_HOBS) += hob_verify.c
 romstage-y += util.c
 romstage-y += memory_init.c
 romstage-$(CONFIG_MMA) += mma_core.c
+romstage-y += cbmem.c
 
 ramstage-y += debug.c
 ramstage-$(CONFIG_RUN_FSP_GOP) += graphics.c

src/drivers/intel/fsp2_0/cbmem.c

@@ -0,0 +1,23 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <cbmem.h>
+#include <fsp/util.h>
+
+void *cbmem_top_chipset(void)
+{
+	struct range_entry tolum;
+
+	fsp_find_bootloader_tolum(&tolum);
+	return (void *)(uintptr_t)range_entry_end(&tolum);
+}