nvc0dis: fix mul/div2,4,8 modifiers of mul f32
nvc0dis: fix mul/div2,4,8 modifiers of mul f32

Tested on nvc0.

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