watchdog: rti-wdt: Add missing pm_runtime_disable() in probe function

If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable().

Fixes: 2d63908bdb ("watchdog: Add K3 RTI watchdog support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220105092114.23932-1-linmq006@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/rti_wdt.c

@@ -228,6 +228,7 @@ static int rti_wdt_probe(struct platform_device *pdev)
 	ret = pm_runtime_get_sync(dev);
 	if (ret) {
 		pm_runtime_put_noidle(dev);
+		pm_runtime_disable(&pdev->dev);
 		return dev_err_probe(dev, ret, "runtime pm failed\n");
 	}