rocker: Don't bother filling in ethtool driver version

The version is same as the default, so don't bother filling it in.

Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240222090042.12609-2-john.g.garry@oracle.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>