nvc0/isa: Add modifiers for shl/shr.
nvc0/isa: Add modifiers for shl/shr.

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