watchdog: pic32-dmt: 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/f9a4dcfc6d31bd9c1417e2d97a40cc2c1dbc6f30.1672496405.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/pic32-dmt.c

@@ -164,11 +164,6 @@ static struct watchdog_device pic32_dmt_wdd = {
 	.ops		= &pic32_dmt_fops,
 };
 
-static void pic32_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int pic32_dmt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -184,20 +179,12 @@ static int pic32_dmt_probe(struct platform_device *pdev)
 	if (IS_ERR(dmt->regs))
 		return PTR_ERR(dmt->regs);
 
-	dmt->clk = devm_clk_get(dev, NULL);
+	dmt->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(dmt->clk)) {
 		dev_err(dev, "clk not found\n");
 		return PTR_ERR(dmt->clk);
 	}
 
-	ret = clk_prepare_enable(dmt->clk);
-	if (ret)
-		return ret;
-	ret = devm_add_action_or_reset(dev, pic32_clk_disable_unprepare,
-				       dmt->clk);
-	if (ret)
-		return ret;
-
 	wdd->timeout = pic32_dmt_get_timeout_secs(dmt);
 	if (!wdd->timeout) {
 		dev_err(dev, "failed to read watchdog register timeout\n");