thunderx nic: mark device as unmaintained
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2060285
Upstream-status: RHEL9 only
Tested: boot, check that log messages are shown
ThunderX platform has been deprecated since RHEL8, and unmaintained in RHEL9. Mark its network driver as unmaintained. See discussion in the related Bugzilla for more details.
Signed-off-by: Íñigo Huguet ihuguet@redhat.com