Input: alps - remove redundant assignment to variable ret

The variable ret is being initialized with a value that is
never read and it is being updated later with a new value. The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200603135742.130852-1-colin.king@canonical.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/alps.c

@@ -1929,7 +1929,7 @@ static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
 static int alps_absolute_mode_v6(struct psmouse *psmouse)
 {
 	u16 reg_val = 0x181;
-	int ret = -1;
+	int ret;
 
 	/* enter monitor mode, to write the register */
 	if (alps_monitor_mode(psmouse, true))