demmt: fix pre-fermi nouveau support
demmt: fix pre-fermi nouveau support

broken by commit 073359a8e3b7ab25f6666fecf55f57856c4219b3
"demmt: stop using ioctl data formatted by mmt"

karolherbst/envytools,grate-driver/envytools,kfractal/envytools,hakzsam/envytools,MoochMcGee/envytools,kfractal/envytools,karolherbst/envytools,grate-driver/envytools,grate-driver/envytools,kfractal/envytools,kfractal/envytools,envytools/envytools,hakzsam/envytools,hakzsam/envytools,envytools/envytools,pierremoreau/envytools,MoochMcGee/envytools,pierremoreau/envytools,karolherbst/envytools,karolherbst/envytools,envytools/envytools,karolherbst/envytools,grate-driver/envytools,kfractal/envytools,grate-driver/envytools,pierremoreau/envytools,hakzsam/envytools,envytools/envytools,pierremoreau/envytools,MoochMcGee/envytools,hakzsam/envytools,pierremoreau/envytools,MoochMcGee/envytools,MoochMcGee/envytools,envytools/envytools