log_backend_std_put had its own implementation for getting standard
flags which was identical to the one in log_backend_std_get_flags().
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Exported header oftenly used when creating a logging
backend that inpects the log 'stream'.
Enables use in external Zephyr modules implementing the
logging backend interface.
Signed-off-by: Emil Hammarstrom <emil.hammarstrom@assaabloy.com>