ethtool: Add Direct Attach support to connector port reporting

This patch allows a base driver to specify Direct Attach as the
type of port through the ethtool interface.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/ethtool.h

@@ -631,6 +631,8 @@ struct ethtool_ops {
 #define PORT_MII		0x02
 #define PORT_FIBRE		0x03
 #define PORT_BNC		0x04
+#define PORT_DA			0x05
+#define PORT_NONE		0xef
 #define PORT_OTHER		0xff
 
 /* Which transceiver to use. */