MFC: Fix a few edge cases with error handling in cpufreq(4)'s CPUFREQ_GET() method.
MFC: Fix a few edge cases with error handling in cpufreq(4)'s CPUFREQ_GET()
method.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase