watchdog: omap_wdt: add device tree support

Add device table for omap_wdt to support dt.

Signed-off-by: Xiao Jiang <jgq516@gmail.com>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/watchdog/omap_wdt.c

@@ -430,6 +430,12 @@ static int omap_wdt_resume(struct platform_device *pdev)
 #define	omap_wdt_resume		NULL
 #endif
 
+static const struct of_device_id omap_wdt_of_match[] = {
+	{ .compatible = "ti,omap3-wdt", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, omap_wdt_of_match);
+
 static struct platform_driver omap_wdt_driver = {
 	.probe		= omap_wdt_probe,
 	.remove		= __devexit_p(omap_wdt_remove),
@@ -439,6 +445,7 @@ static struct platform_driver omap_wdt_driver = {
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "omap_wdt",
+		.of_match_table = omap_wdt_of_match,
 	},
 };