net/aeroflex: Don't assign FW if it is not available

If FW version is not available, it is enough to leave that field as
empty, there is no need to write N/A.
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/aeroflex/greth.c

@@ -1115,7 +1115,6 @@ static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *in
 	strlcpy(info->driver, dev_driver_string(greth->dev),
 		sizeof(info->driver));
 	strlcpy(info->bus_info, greth->dev->bus->name, sizeof(info->bus_info));
-	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
 }
 
 static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)