Please follow the same , for proper device definetions of your WLC in your PI .
Downloading Device Support and Product Updates
Device Package updates and software updates for major Prime Infrastructure product releases are integrated into update bundles. These bundles are available for download directly from Cisco.
To install update bundles for Prime Infrastructure:
Step 1 
Depending on your connectivity, do one of the following:
•If Prime Infrastructure has external connectivity:
–Choose Administration > Software Update.
–Click Check for Updates.
–Enter your Cisco.com login credentials.
•If Prime Infrastructure does not have external connectivity:
–Go to Cisco.com/go/primeinfrastructure.
–Under Support, select Download Software.
–Choose Cisco Prime Infrastructure, then select the correct version of Prime Infrastructure.
–From the page that appears, download the latest update file (with the extension .ubf).
Note Be sure to download the software updates that match your Prime Infrastructure version. For example, software updates for Release 1.1 can be installed only on Prime Infrastructure 1.1.
–Choose Administration > Software Update.
–Click Upload Update File and browse to locate the update bundles you downloaded.
The Software Updates table appears.
Step 2 To install the software updates:
a. Choose the software updates you want to install, and click Install.
Note When you choose an update, all the uninstalled updates published prior to the update you have chosen are also auto-selected. In Prime Infrastructure, it is mandatory to install software updates incrementally, because older updates are sometimes prerequisites to more recent updates. This behavior also occurs in uninstallation.
The installed software updates appear at the bottom of the table, with a check mark at the Installed column.
b. If the Pending Restart value is yes, restart Prime Infrastructure to complete the update.
c. To uninstall any software updates, select the updates and click Uninstall.
