drivers: net: loopback: Set interface name to lo

Set the loopback interface name to "lo" instead of using the
default "dummy0" as the former is a more appropriate.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
(cherry picked from commit 8b1f06af052f465e7d7094a49764d6aba76b4655)
1 file changed