Fix rocminfo when run within docker environments. #49
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Currently, rocminfo will fail when executed inside a docker container
due to being unable to lsmod inside docker. This has impacts on rocprofiler use.
Fix this behavior by querying initstate of the amdgpu module from
/sys/module/amdgpu instead. If initstate is marked "live" everything is
fine - error out with either "not loaded" (initstate file does not
exist) or "not live" (initstate file does not contain "live" string).