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/sky2.c b/drivers/net/sky2.c
index 5c7e2d6..3ee41da 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -3413,10 +3413,10 @@
 	ecmd->phy_address = PHY_ADDR_MARV;
 	if (sky2_is_copper(hw)) {
 		ecmd->port = PORT_TP;
-		ecmd->speed = sky2->speed;
+		ethtool_cmd_speed_set(ecmd, sky2->speed);
 		ecmd->supported |=  SUPPORTED_Autoneg | SUPPORTED_TP;
 	} else {
-		ecmd->speed = SPEED_1000;
+		ethtool_cmd_speed_set(ecmd, SPEED_1000);
 		ecmd->port = PORT_FIBRE;
 		ecmd->supported |=  SUPPORTED_Autoneg | SUPPORTED_FIBRE;
 	}