Add a comment to clarify that some BIOSes may clear the hw watchdog indicator bit, preventing us from reporting in that case.
Add a comment to clarify that some BIOSes may clear the hw watchdog
indicator bit, preventing us from reporting in that case.

X-MFC-with:	r215868

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