If you are looking out for an option to add the RDLC reports in Visual Studio 2015 , you need to add it when installing or modifying the Visual Studio 2015.
How to add the missing Microsoft RDLC Report Designer in Visual Studio 2015 ?
The Microsoft RDLC Report Designer is part of the Microsoft SQL Server Data Tools and can be added by modifying the Visual Studio installation and selecting Microsoft SQL Server Data Tools.