watchdog: imx: use clk_get to acquire the watchdog clock

Use clk_get to acquire the watchdog clock and also avoid hardcoding the clock name.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 2ee7dac..86f7cac 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -270,7 +270,7 @@
 		return -ENOMEM;
 	}
 
-	imx2_wdt.clk = clk_get_sys("imx-wdt.0", NULL);
+	imx2_wdt.clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(imx2_wdt.clk)) {
 		dev_err(&pdev->dev, "can't get Watchdog clock\n");
 		return PTR_ERR(imx2_wdt.clk);