fsp: Change mobo partnumbers to reflect that it's running code FSP variant

Change-Id: I7c823550bf77b03907fa8940a8800658d66d6786
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7183
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>