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/bnx2.c b/drivers/net/bnx2.c
index e43efd8..1bebdfb 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -6696,17 +6696,16 @@
 
 	if (bp->autoneg & AUTONEG_SPEED) {
 		cmd->autoneg = AUTONEG_ENABLE;
-	}
-	else {
+	} else {
 		cmd->autoneg = AUTONEG_DISABLE;
 	}
 
 	if (netif_carrier_ok(dev)) {
-		cmd->speed = bp->line_speed;
+		ethtool_cmd_speed_set(cmd, bp->line_speed);
 		cmd->duplex = bp->duplex;
 	}
 	else {
-		cmd->speed = -1;
+		ethtool_cmd_speed_set(cmd, -1);
 		cmd->duplex = -1;
 	}
 	spin_unlock_bh(&bp->phy_lock);