Hi Team,
I find the solution for above mentioned error while upgrading SQL Server 2014.
Evaluation pack of SQL Server 2008 R2 standard edition which has been installed and automatically it will register as Enterprise edition. And trying to install the Upgrade of SQL Server 2014 standard edition. The issue has been find via sql installation setup "Install SQL Server discovery report" where it provides the full details of what version of sql server edition is installed.
regards
Jayakumar