libpayload: Cache physical location of CBMEM entries

In the presence of self-relocating payloads, it's safer to keep
physical addresses in `libsysinfo`. This updates all the references
to CBMEM entries that are not consumed inside libpayload code.

Change-Id: I3be64c8be8b46d00b457eafd7f80a8ed8e604030
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43580
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

payloads/coreinfo/timestamps_module.c

@@ -147,7 +147,7 @@ static int timestamps_module_init(void)
 	if (ret)
 		return -1;
 
-	struct timestamp_table *timestamps = lib_sysinfo.tstamp_table;
+	struct timestamp_table *timestamps = phys_to_virt(lib_sysinfo.tstamp_table);
 
 	if (timestamps == NULL)
 		return -1;