Input: synaptics - handle spurious release of trackstick buttons, again

Looks like the fimware 8.2 still has the extra buttons spurious release
bug.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=114321


Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>