This particular laptop has its motherboard replaced and after that, even with the latest BIOS, some DMI identification strings have become "INVALID". This includes DMI_PRODUCT_VERSION which results Wifi being blocked. It seems that DMI_BOARD_NAME is still valid so use that as an alternative for Lenovo Yoga 900. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>