Cleanup nvml code a little.
Cleanup nvml code a little.

A few print statements were left over from debugging.
Also check errors from nvml and cuda pciinfo functions, disabling the component in a few more cases.

arm-hpc/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi