Added a missing default case in the mainboard specific configuration selection. The missing default case prevented sensor data from getting displayed on unknown Asus mainboards with NCT6779D super I/O.

 <?xml version="1.0" encoding="utf-8"?>

 <configuration>

   <startup>

     <supportedRuntime version="v4.0" />

     <supportedRuntime version="v2.0.50727"/>

   </startup>

 </configuration>