Add tracing output to console to track when drivers lock and unlock deep
sleep. Tracing output is enabled by configuring the
'SLEEP_PROFILING_ENABLED' at compile time.
- Wrapped sleep_manager_lock/sleep_manager_unlock in a macro to
conditionally call tracing functions when 'SLEEP_PROFILING_ENABLED' is
set.
- Define a global structure to track driver names and how many locks
they hold in the sleep manager.
Sleep manager provides API to lock/unlock deepsleep. This API allows a user to
control deep sleep.
This API should be done via atomic operations (to be IRQ/thread safe).