net: Add ethtool to mii advertisment conversion helpers

Translating between ethtool advertisement settings and MII
advertisements are common operations for ethernet drivers.  This patch
adds a set of helper functions that implements the conversion.  The
patch then modifies a couple of the drivers to use the new functions.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 83a5a5a..edb905f 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -563,20 +563,9 @@
 	if (adv < 0)
 		return adv;
 
-	adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | 
+	adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
 		 ADVERTISE_PAUSE_ASYM);
-	if (advertise & ADVERTISED_10baseT_Half)
-		adv |= ADVERTISE_10HALF;
-	if (advertise & ADVERTISED_10baseT_Full)
-		adv |= ADVERTISE_10FULL;
-	if (advertise & ADVERTISED_100baseT_Half)
-		adv |= ADVERTISE_100HALF;
-	if (advertise & ADVERTISED_100baseT_Full)
-		adv |= ADVERTISE_100FULL;
-	if (advertise & ADVERTISED_Pause)
-		adv |= ADVERTISE_PAUSE_CAP;
-	if (advertise & ADVERTISED_Asym_Pause)
-		adv |= ADVERTISE_PAUSE_ASYM;
+	adv |= ethtool_adv_to_mii_100bt(advertise);
 
 	if (adv != oldadv) {
 		err = phy_write(phydev, MII_ADVERTISE, adv);
@@ -595,10 +584,7 @@
 			return adv;
 
 		adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
-		if (advertise & SUPPORTED_1000baseT_Half)
-			adv |= ADVERTISE_1000HALF;
-		if (advertise & SUPPORTED_1000baseT_Full)
-			adv |= ADVERTISE_1000FULL;
+		adv |= ethtool_adv_to_mii_1000T(advertise);
 
 		if (adv != oldadv) {
 			err = phy_write(phydev, MII_CTRL1000, adv);