nvc0/isa: Add ftz flag for slct f32.
nvc0/isa: Add ftz flag for slct f32.

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