Use the actual minimum timeout used by the sample for task watchdog
channels (100 ms) as the configuration value for the fallback hardware
watchdog, to avoid unnecessary executions of the timer handler.
Add missing indentation in the documentation of the sample so that
the console output is rendered correctly.
Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
Reboot functionality has nothing to do with PM, so move it out to the
subsys/os folder.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
