vendorcode/siemens: Add HWID to hwilib

Add the location of HWID field so that hwilib supports this
value as well.

Change-Id: If6d4695f861232231ac8f9c247c0a10410dac1c5
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/17575
Tested-by: build bot (Jenkins)
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
2 files changed