watchdog: jz4740: Add DT support

Add DT support to the jz4740 driver. Simple of_match_ptr. No other
modification for probe needed
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/jz4740_wdt.c

@@ -24,6 +24,7 @@
 #include <linux/clk.h>
 #include <linux/slab.h>
 #include <linux/err.h>
+#include <linux/of.h>
 
 #include <asm/mach-jz4740/timer.h>
 
@@ -142,6 +143,14 @@ static const struct watchdog_ops jz4740_wdt_ops = {
 	.set_timeout = jz4740_wdt_set_timeout,
 };
 
+#ifdef CONFIG_OF
+static const struct of_device_id jz4740_wdt_of_matches[] = {
+	{ .compatible = "ingenic,jz4740-watchdog", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jz4740_wdt_of_matches)
+#endif
+
 static int jz4740_wdt_probe(struct platform_device *pdev)
 {
 	struct jz4740_wdt_drvdata *drvdata;
@@ -211,6 +220,7 @@ static struct platform_driver jz4740_wdt_driver = {
 	.remove = jz4740_wdt_remove,
 	.driver = {
 		.name = "jz4740-wdt",
+		.of_match_table = of_match_ptr(jz4740_wdt_of_matches),
 	},
 };