board_enable.c: Fix dmi_match string for ThinkPad X201

TESTED, flashrom now properly works on Thinkpad X201 running vendor
firmware and coreboot.

Change-Id: I40dc7204499323148707b392d94ecd4b212f9ace
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/27504
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
1 file changed