cxgb4: distinguish between 1-lane KR/KX and 4-lane KR/KX/KX4 ports

And fix the supported flags ethtool reports for the two cases.

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 files changed