pm: device: introduce pm_device_driver_deinit()

Introduce pm_device_driver_deinit() which is required to fully
support device_deinit(). This function shall be called by drivers
when device_deinit() is called.

If PM_DEVICE is enabled, it will
simply check whether the device is either SUSPENDED or OFF, this
will prevent device_deinit() on a device which is currently in
use, and ensure the device is in the correct state if device_init()
is called later.

If PM_DEVICE is not enabled, it will invoke the SUSPEND action which
mirrors the pm_device_driver_init() behavior. Note that TURN_OFF
action is not called since the device is deinitialized after this
call.

Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>