Does anyone know why nouveau_dri.so is missing from the version of mesa-dri-drivers on Redhat 6?

Hi - A recent update of mesa-dri-drivers on Redhat 6 (upgraded 7 to 9), 
removed the nouveau_dri.so file, which libGl uses.  Does anyone know why 
Redhat might have done this?  I've looked through redhat's bugzilla, but 
no one there seems to have reported this.  We don't have a service 
contract with redhat, so my experience is that they are unlikely to 
respond to my query. 

Programs that try to find nouveau_dri.so, display an error, and then 
they use swrast_dri.so instead.

Should I create a symbolic link (or alternative), to remove this error 
message, or should I simply downgrade to the previous version of 
mesa-dri-drivers? 

Thanks. - Mark