Fix a warning in nvbios.c about an unused variable
Fix a warning in nvbios.c about an unused variable

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