[ETHTOOL]: Add 2.5G bit definitions.

Add 2.5G supported and advertising bit definitions.  2.5G is supported
by the bnx2 driver.
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/ethtool.h

@@ -434,6 +434,7 @@ struct ethtool_ops {
 #define SUPPORTED_10000baseT_Full	(1 << 12)
 #define SUPPORTED_Pause			(1 << 13)
 #define SUPPORTED_Asym_Pause		(1 << 14)
+#define SUPPORTED_2500baseX_Full	(1 << 15)
 
 /* Indicates what features are advertised by the interface. */
 #define ADVERTISED_10baseT_Half		(1 << 0)
@@ -451,6 +452,7 @@ struct ethtool_ops {
 #define ADVERTISED_10000baseT_Full	(1 << 12)
 #define ADVERTISED_Pause		(1 << 13)
 #define ADVERTISED_Asym_Pause		(1 << 14)
+#define ADVERTISED_2500baseX_Full	(1 << 15)
 
 /* The following are all involved in forcing a particular link
  * mode for the device for setting things.  When getting the