libpayload: Cache physical CMOS option table location

In the presence of self-relocating payloads, it's safer to keep
physical addresses in `libsysinfo`.

Change-Id: I64a37bef263022edb504086c02a3fd22ce068ba4
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43576
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>

payloads/libpayload/drivers/options.c

@@ -53,7 +53,7 @@ struct nvram_accessor *use_mem = &(struct nvram_accessor) {
 
 struct cb_cmos_option_table *get_system_option_table(void)
 {
-	return lib_sysinfo.option_table;
+	return phys_to_virt(lib_sysinfo.cmos_option_table);
 }
 
 int options_checksum_valid(const struct nvram_accessor *nvram)