Input: cypress_ps2 - remove casting the return value which is a void pointer

Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/cypress_ps2.c

@@ -679,7 +679,7 @@ int cypress_init(struct psmouse *psmouse)
 {
 	struct cytp_data *cytp;
 
-	cytp = (struct cytp_data *)kzalloc(sizeof(struct cytp_data), GFP_KERNEL);
+	cytp = kzalloc(sizeof(struct cytp_data), GFP_KERNEL);
 	psmouse->private = (void *)cytp;
 	if (cytp == NULL)
 		return -ENOMEM;