nvagetbios: Fix compiler warnings
nvagetbios: Fix compiler warnings

It turns out result is no longer used since fprintfs are now done
earlier, so just return 0 if EOK was returned instead.

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