ethtool: Add port type PORT_OTHER

Add a PORT_OTHER to represent all other physical port types.  Current
NICs generally do not allow switching between multiple port types in
software so specific types should not be needed.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/ethtool.h

@@ -605,6 +605,7 @@ struct ethtool_ops {
 #define PORT_MII		0x02
 #define PORT_FIBRE		0x03
 #define PORT_BNC		0x04
+#define PORT_OTHER		0xff
 
 /* Which transceiver to use. */
 #define XCVR_INTERNAL		0x00