nvbios: improve readability of the perftbl parsing on nva3+
nvbios: improve readability of the perftbl parsing on nva3+

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