net: wangxun: restrict feature flags for tunnel packets

Implement ndo_features_check to restrict Tx checksum offload flags, since
there are some inner layer length and protocols unsupported.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Link: https://patch.msgid.link/20250421022956.508018-3-jiawenwu@trustnetic.com


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