I see this error from time to time, usually when you try to create a Power View report from the data connection you get the error that Power View is not support in this edition of reporting services.
Very self explanatory, its the edition of reporting services that was installed on the SharePoint Farm for Integrated mode that’s wrong. The requirements Business Intelligence as environment is SQL Server BI edition or Enterprise edition.
Chances are when Reporting Services Integrated mode was installed, it was installed with SQL Server Standard Edition.
So how do you fix it? You can easily upgrade the edition of SQL Server installed and it will take care of the problem.