platform/x86: asus-wmi: Fix condition in charge_threshold_store()

This error handling is reversed so we return early.

Fixes: 84d8e80b ("platform/x86: asus-wmi: Refactor charge_threshold_store()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/asus-wmi.c

@@ -2068,7 +2068,7 @@ static ssize_t charge_threshold_store(struct device *dev,
 		return -EINVAL;
 
 	ret = asus_wmi_set_devstate(ASUS_WMI_CHARGE_THRESHOLD, value, &rv);
-	if (!ret)
+	if (ret)
 		return ret;
 
 	if (rv != 1)