watchdog: meson_gxbb: 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 <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Reviewed-by: Martin Blumenstingl <[e-mail]>
Link: https://lore.kernel.org/r/6c5948373d[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/meson_gxbb_wdt.c

···
 };
 MODULE_DEVICE_TABLE(of, meson_gxbb_wdt_dt_ids);
 
-static void meson_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int meson_gxbb_wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct meson_gxbb_wdt *data;
-	int ret;
 	u32 ctrl_reg;
 
 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
···
 	if (IS_ERR(data->reg_base))
 		return PTR_ERR(data->reg_base);
 
-	data->clk = devm_clk_get(dev, NULL);
+	data->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(data->clk))
 		return PTR_ERR(data->clk);
-
-	ret = clk_prepare_enable(data->clk);
-	if (ret)
-		return ret;
-	ret = devm_add_action_or_reset(dev, meson_clk_disable_unprepare,
-				       data->clk);
-	if (ret)
-		return ret;
 
 	platform_set_drvdata(pdev, data);