mfd: kempld-core: Simplify function return logic

The invoked functions already return zero on success or a negative
errno code so there is no need to open code the logic in the caller.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/kempld-core.c

@@ -448,7 +448,6 @@ static int kempld_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct kempld_device_data *pld;
 	struct resource *ioport;
-	int ret;
 
 	pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
 	if (!pld)
@@ -471,11 +470,7 @@ static int kempld_probe(struct platform_device *pdev)
 	mutex_init(&pld->lock);
 	platform_set_drvdata(pdev, pld);
 
-	ret = kempld_detect_device(pld);
-	if (ret)
-		return ret;
-
-	return 0;
+	return kempld_detect_device(pld);
 }
 
 static int kempld_remove(struct platform_device *pdev)
@@ -756,7 +751,6 @@ MODULE_DEVICE_TABLE(dmi, kempld_dmi_table);
 static int __init kempld_init(void)
 {
 	const struct dmi_system_id *id;
-	int ret;
 
 	if (force_device_id[0]) {
 		for (id = kempld_dmi_table;
@@ -771,11 +765,7 @@ static int __init kempld_init(void)
 			return -ENODEV;
 	}
 
-	ret = platform_driver_register(&kempld_driver);
-	if (ret)
-		return ret;
-
-	return 0;
+	return platform_driver_register(&kempld_driver);
 }
 
 static void __exit kempld_exit(void)