hwtest/nv04_pgraph: Fix Celsius tests on NV15/NV11/NV17.
hwtest/nv04_pgraph: Fix Celsius tests on NV15/NV11/NV17.

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