[media] media/i2c/tc358743: Initialize timer

This converts to use setup_timer() to set callback and data, though it
doesn't look like this would have worked with timer checking enabled
since no init_timer() was ever called before.

Cc: Mats Randgaard <matrandg@cisco.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/tc358743.c

@@ -2147,8 +2147,8 @@ static int tc358743_probe(struct i2c_client *client,
 	} else {
 		INIT_WORK(&state->work_i2c_poll,
 			  tc358743_work_i2c_poll);
-		state->timer.data = (unsigned long)state;
-		state->timer.function = tc358743_irq_poll_timer;
+		setup_timer(&state->timer, tc358743_irq_poll_timer,
+			    (unsigned long)state);
 		state->timer.expires = jiffies +
 				       msecs_to_jiffies(POLL_INTERVAL_MS);
 		add_timer(&state->timer);