regulator: fan53555: Use PTR_RET function

Used PTR_RET function instead of IS_ERR and PTR_ERR.
Patch found using coccinelle.

Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index 9165b0c..f0e1ae5 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -219,9 +219,7 @@
 	rdesc->owner = THIS_MODULE;
 
 	di->rdev = regulator_register(&di->desc, config);
-	if (IS_ERR(di->rdev))
-		return PTR_ERR(di->rdev);
-	return 0;
+	return PTR_RET(di->rdev);
 
 }