watchdog: ath79_wdt: switch to clk_prepare/clk_disable

Replace clk_enable() and clk_disable() calls with
clk_prepare_enable() and clk_disable_unprepare()
to get ready for the migration to the common clock
framework.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/ath79_wdt.c

@@ -265,7 +265,7 @@ static int ath79_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(wdt_clk))
 		return PTR_ERR(wdt_clk);
 
-	err = clk_enable(wdt_clk);
+	err = clk_prepare_enable(wdt_clk);
 	if (err)
 		return err;
 
@@ -296,14 +296,14 @@ static int ath79_wdt_probe(struct platform_device *pdev)
 	return 0;
 
 err_clk_disable:
-	clk_disable(wdt_clk);
+	clk_disable_unprepare(wdt_clk);
 	return err;
 }
 
 static int ath79_wdt_remove(struct platform_device *pdev)
 {
 	misc_deregister(&ath79_wdt_miscdev);
-	clk_disable(wdt_clk);
+	clk_disable_unprepare(wdt_clk);
 	return 0;
 }