vendorcode/google: Deal with MULTIPLE_CBFS_INSTANCES

We need to special-case filling out the vboot structures when
we use CBFS instead of vboot's custom indexed format, otherwise
(due to the way the CBFS header looks), it will try to write several
million entries.

Change-Id: Ie1289d4a19060bac48089ff70e5cfc04a2de373f
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/11914
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/vendorcode/google/chromeos/vboot2/vboot_handoff.c

@@ -151,6 +151,9 @@ void vboot_fill_handoff(void)
 	if (vboot_is_readonly_path())
 		return;
 
+	if (IS_ENABLED(CONFIG_MULTIPLE_CBFS_INSTANCES))
+		return;
+
 	if (vb2_get_selected_region(&fw_main))
 		die("No component metadata.\n");