ixgbe: report correct media type for KR, KX and KX4 interfaces

ethtool reports backplane type interfaces as 1000/10000baseT link modes.
This has been corrected to report the media as KR, KX or KX4 based on the backplane interface present.

Signed-off-by: Veola Nazareth <veola.nazareth@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

@@ -193,7 +193,9 @@ static int ixgbe_get_settings(struct net_device *netdev,
 	if (supported_link & IXGBE_LINK_SPEED_10GB_FULL)
 		ecmd->supported |= ixgbe_get_supported_10gtypes(hw);
 	if (supported_link & IXGBE_LINK_SPEED_1GB_FULL)
-		ecmd->supported |= SUPPORTED_1000baseT_Full;
+		ecmd->supported |= (ixgbe_isbackplane(hw->phy.media_type)) ?
+				   SUPPORTED_1000baseKX_Full :
+				   SUPPORTED_1000baseT_Full;
 	if (supported_link & IXGBE_LINK_SPEED_100_FULL)
 		ecmd->supported |= ixgbe_isbackplane(hw->phy.media_type) ?
 				   SUPPORTED_1000baseKX_Full :