ethtool: cosmetic: Use ethtool ethtool_cmd_speed API

This updates the network drivers so that they don't access the
ethtool_cmd::speed field directly, but use ethtool_cmd_speed()
instead.

For most of the drivers, these changes are purely cosmetic and don't
fix any problem, such as for those 1GbE/10GbE drivers that indirectly
call their own ethtool get_settings()/mii_ethtool_gset(). The changes
are meant to enforce code consistency and provide robustness with
future larger throughputs, at the expense of a few CPU cycles for each
ethtool operation.

All drivers compiled with make allyesconfig ion x86_64 have been
updated.

Tested: make allyesconfig on x86_64 + e1000e/bnx2x work
Signed-off-by: David Decotigny <decot@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbevf/ethtool.c b/drivers/net/ixgbevf/ethtool.c
index 0563ab2..deee375 100644
--- a/drivers/net/ixgbevf/ethtool.c
+++ b/drivers/net/ixgbevf/ethtool.c
@@ -104,11 +104,13 @@
 	hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
 
 	if (link_up) {
-		ecmd->speed = (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
-			       SPEED_10000 : SPEED_1000;
+		ethtool_cmd_speed_set(
+			ecmd,
+			(link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
+			SPEED_10000 : SPEED_1000);
 		ecmd->duplex = DUPLEX_FULL;
 	} else {
-		ecmd->speed = -1;
+		ethtool_cmd_speed_set(ecmd, -1);
 		ecmd->duplex = -1;
 	}