[dpdk-test-report] || pw76495 net/iavf: downgrade error log

[0-day Robot]

From: robot at bytheb.org

Test-Label: travis-robot
Test-Status: 
http://dpdk.org/patch/76495

_Travis build: errored_
Build URL: https://travis-ci.com/ovsrobot/dpdk/builds/182727354