MCUX watchdog timer supports min window of 500ms. Increase maximum task
watchdog timeout window to 500ms by default, so that this sample can run
on iMX RT SOCs. Also update iMX RT watchdog driver to reject timeout
maximums under 500ms with a useful error message
Fixes#40153
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
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>