powercap: Simplify powercap_init()

Simplify powercap_init() by reducing the number of redundant
assignments in it.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
[ rjw: Subject+changelog ]
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/powercap/powercap_sys.c

@@ -673,15 +673,13 @@ EXPORT_SYMBOL_GPL(powercap_unregister_control_type);
 
 static int __init powercap_init(void)
 {
-	int result = 0;
+	int result;
 
 	result = seed_constraint_attributes();
 	if (result)
 		return result;
 
-	result = class_register(&powercap_class);
-
-	return result;
+	return class_register(&powercap_class);
 }
 
 device_initcall(powercap_init);