commit 810aa091 upstream.

This change allows the driver to recognize newer Elantech touchpads.
Signed-off-by: Yi ju Hong <sam.hung@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
[ kamal: backport to 3.13-stable: picked up case 9 also ]
Signed-off-by: Kamal Mostafa <kamal@canonical.com>