video: fbdev: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. One tracking pointer was added.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: David Lechner <david@lechnology.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Jean Delvare <jdelvare@suse.de>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
[b.zolnierkie: ported it over pxa3xx_gcu changes]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/omap/hwa742.c

@@ -474,7 +474,7 @@ static void auto_update_complete(void *data)
 			  jiffies + HWA742_AUTO_UPDATE_TIME);
 }
 
-static void hwa742_update_window_auto(unsigned long arg)
+static void hwa742_update_window_auto(struct timer_list *unused)
 {
 	LIST_HEAD(req_list);
 	struct hwa742_request *last;
@@ -1002,9 +1002,7 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode,
 	hwa742.auto_update_window.height = fbdev->panel->y_res;
 	hwa742.auto_update_window.format = 0;
 
-	init_timer(&hwa742.auto_update_timer);
-	hwa742.auto_update_timer.function = hwa742_update_window_auto;
-	hwa742.auto_update_timer.data = 0;
+	timer_setup(&hwa742.auto_update_timer, hwa742_update_window_auto, 0);
 
 	hwa742.prev_color_mode = -1;
 	hwa742.prev_flags = 0;