netlink: add LINKSTATE SQI support

Some PHYs provide Signal Quality Index (SQI) if the link is in active
state. This information can help to diagnose cable and system design
related issues.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
2 files changed