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This avoids multiple threads interfering with
each other during chassis power operations.

The underlying issue with memory corruption
was fixed in Zephyr PR 35072.

Rework CPU regulator data structures for additional
clarity on configuration.

Increase service process stack sizes
Move power button press message to correct location

This enables temperature display in the Web portal,
and lays the groundwork for a future fan control
service.

Sensor data currently available via 'occcontrol poll'
command at console.

Tested with:
redfishtool.py -S Never -r <host IP>:8080 Systems reset On
redfishtool.py -S Never -r <host IP>:8080 Systems reset ForceOff

Minor cleanup

Only responds to API version request

Enable console POST codes by default

This maintains repsonsiveness of console / IPMI
during the IPL process.

With previous changes in the Zephyr configuration
and Web services controllers, this allows file uploads
and downloads to function while fixing the simultaneous
connection stall problem seen previously.

This is in preparation for adding a Redfish protocol
server.

Fast read and quad SPI are not supported by all Flash
devices / board wiring schemes.  Only enable them if
the detected and configured device supports them.

Framework now in place for further expansion