Handle "No Detected GPU"

[coleramos425]

If for whatever reason, if a system's GPU is unavailable, the rocm-smi method of detecting system information leads to issues

i.e.

$ omniperf profile -n test -- ls
ROC Profiler:  opt/rocm-5.2.0/.info/version
Traceback (most recent call last):
  File "/bin/omniperf", line 663, in <module>
    main()
  File "/bin/omniperf", line 474, in main
    args.target = get_soc()  # Must have a valid soc in profile mode
  File "/bin/omniperf", line 83, in get_soc
    mspec = specs.get_machine_specs(0)
  File "/omniperf/1.0.6/bin/utils/specs.py", line 233, in get_machine_specs
    freq = search(device, rocm_smi).split()
AttributeError: 'NoneType' object has no attribute 'split'

In this situation could we handle this more gracefully? Check the results of the run commands in machine specs.

[coleramos425]

Fix added to dev branch. Closing issue.