Whitelist Lenovo Thinkpad X220

Coreboot uses the subvendor VID/DID of the Thinkpad X220-Tablet for
all X220 variants. Don't specify a dmidecode string so that it can be
used with coreboot on all X220 variants and on X220-Tablet with vendor

Change-Id: Idd667da8209a664469c1a909a549d2b625714a78
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/23225
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
1 file changed