vyos.ethtool: T3935: relax __init__() when driver name is not detected
vyos.ethtool: T3935: relax __init__() when driver name is not detected

In addition to commit 0b414bcd ("vyos.ethtool: T3874: do not throw exception
if adapter has issues with autoneg") we should also not care too strict when
locating the driver name.

This might cause false positives.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x