watchdog: pnx4008: Use devm_clk_get_enabled() helper

The devm_clk_get_enabled() helper:
   - calls devm_clk_get()
   - calls clk_prepare_enable() and registers what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the need of a dedicated function used
with devm_add_action_or_reset().
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/61f4e39db4c88408ee0149580e9aa925b784bc93.1672496714.git.christophe.jaillet@wanadoo.frSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/pnx4008_wdt.c

@@ -179,11 +179,6 @@ static struct watchdog_device pnx4008_wdd = {
 	.max_timeout = MAX_HEARTBEAT,
 };
 
-static void pnx4008_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int pnx4008_wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -195,18 +190,10 @@ static int pnx4008_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(wdt_base))
 		return PTR_ERR(wdt_base);
 
-	wdt_clk = devm_clk_get(dev, NULL);
+	wdt_clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(wdt_clk))
 		return PTR_ERR(wdt_clk);
 
-	ret = clk_prepare_enable(wdt_clk);
-	if (ret)
-		return ret;
-	ret = devm_add_action_or_reset(dev, pnx4008_clk_disable_unprepare,
-				       wdt_clk);
-	if (ret)
-		return ret;
-
 	pnx4008_wdd.bootstatus = (readl(WDTIM_RES(wdt_base)) & WDOG_RESET) ?
 			WDIOF_CARDRESET : 0;
 	pnx4008_wdd.parent = dev;