bonding: allow all slave speeds

No need to check for 10, 100, 1000, 10000 explicitly. Just make this
generic and check for invalid values only (similar check is in ethtool
userspace app). This enables correct speed handling for slave devices
with "nonstandard" speeds.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -629,15 +629,8 @@ static int bond_update_speed_duplex(struct slave *slave)
 		return -1;
 
 	slave_speed = ethtool_cmd_speed(&etool);
-	switch (slave_speed) {
-	case SPEED_10:
-	case SPEED_100:
-	case SPEED_1000:
-	case SPEED_10000:
-		break;
-	default:
+	if (slave_speed == 0 || slave_speed == ((__u32) -1))
 		return -1;
-	}
 
 	switch (etool.duplex) {
 	case DUPLEX_FULL: