net: Print stack usage and statistics for every transmitted msg

The TX stack usage data and statistics were only printed
if there was an error. This happened very seldom which was
not very helpful.

Change-Id: I059cf9ee3449e5b39d872ef6026df968d86d0209
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>