idpf: don't skip over ethtool tcp-data-split setting

JIRA: https://issues.redhat.com/browse/RHEL-36182
Depends: !4218 (merged)

This fixes a bug in idpf where "ethtool -G ... tcp-data-split off" was silently ignored.

Signed-off-by: Michal Schmidt mschmidt@redhat.com