ethtool-copy.h:sync with net

This covers kernel changes upto:

commit 89da45b8b5b2187734a11038b8593714f964ffd1
Author: Gal Pressman <galp@mellanox.com>
Date:   Thu Jun 23 17:02:43 2016 +0300

    ethtool: Add 50G baseSR2 link mode

    Add ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT bit.

    Signed-off-by: Gal Pressman <galp@mellanox.com>
    Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
    Cc: Ben Hutchings <bwh@kernel.org>
    Cc: David Decotigny <decot@googlers.com>
    Acked-By: David Decotigny <decot@googlers.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/ethtool-copy.h b/ethtool-copy.h
index 7c581ea..246f7b0 100644
--- a/ethtool-copy.h
+++ b/ethtool-copy.h
@@ -1351,6 +1351,16 @@
 	ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT	= 28,
 	ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT	= 29,
 	ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT	= 30,
+	ETHTOOL_LINK_MODE_25000baseCR_Full_BIT	= 31,
+	ETHTOOL_LINK_MODE_25000baseKR_Full_BIT	= 32,
+	ETHTOOL_LINK_MODE_25000baseSR_Full_BIT	= 33,
+	ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT	= 34,
+	ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT	= 35,
+	ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT	= 36,
+	ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT	= 37,
+	ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT	= 38,
+	ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT	= 39,
+	ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT         = 40,
 
 	/* Last allowed bit for __ETHTOOL_LINK_MODE_LEGACY_MASK is bit
 	 * 31. Please do NOT define any SUPPORTED_* or ADVERTISED_*
@@ -1359,7 +1369,7 @@
 	 */
 
 	__ETHTOOL_LINK_MODE_LAST
-	  = ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT,
+	  = ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT,
 };
 
 #define __ETHTOOL_LINK_MODE_LEGACY_MASK(base_name)	\
@@ -1646,9 +1656,9 @@
  *	%ETHTOOL_GLINKSETTINGS: on entry, number of words passed by user
  *	(>= 0); on return, if handshake in progress, negative if
  *	request size unsupported by kernel: absolute value indicates
- *	kernel recommended size and cmd field is 0, as well as all the
- *	other fields; otherwise (handshake completed), strictly
- *	positive to indicate size used by kernel and cmd field is
+ *	kernel expected size and all the other fields but cmd
+ *	are 0; otherwise (handshake completed), strictly positive
+ *	to indicate size used by kernel and cmd field stays
  *	%ETHTOOL_GLINKSETTINGS, all other fields populated by driver. For
  *	%ETHTOOL_SLINKSETTINGS: must be valid on entry, ie. a positive
  *	value returned previously by %ETHTOOL_GLINKSETTINGS, otherwise