Unify new line characters in the ENA driver

Some messages were missing new line character and traces were not having
unified behavior. To fix that, each trace and printout should add new
line character at the end of each string - that should improve
readability.

Submitted by: Rafal Kozik <rk@semihalf.com>
Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.