UBUNTU: SAUCE: (noup) Input: synaptics - handle spurious release of trackstick buttons, again

BugLink: http://bugs.launchpad.net/bugs/1553811

Looks like the fimware 8.2 stall has the extra buttons spurious release
bug.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Joseph Salisbury <joseph.salisbury@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

drivers/input/mouse/synaptics.c

@@ -863,7 +863,8 @@ static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 		return;
 
 	/* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
-	if (SYN_ID_FULL(priv->identity) == 0x801 &&
+	if ((SYN_ID_FULL(priv->identity) == 0x801 ||
+	     SYN_ID_FULL(priv->identity) == 0x802) &&
 	    !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 		return;