netlink: add netlink handler for tsinfo (-T)

Implement "ethtool -T <dev>" subcommand using ETHTOOL_MSG_TSINFO_GET
netlink message. This retrieves and displays device timestamping
information, traditionally provided by ETHTOOL_GET_TS_INFO ioctl request.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
4 files changed