i40e: remove unnecessary check for old MAC == new MAC

The check has been moved to core. The ndo_set_mac_address callback
is not being called with new MAC address equal to the old one anymore.
Signed-off-by: Piotr Gardocki <piotrx.gardocki@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -1788,12 +1788,6 @@ static int i40e_set_mac(struct net_device *netdev, void *p)
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	if (ether_addr_equal(netdev->dev_addr, addr->sa_data)) {
-		netdev_info(netdev, "already using mac address %pM\n",
-			    addr->sa_data);
-		return 0;
-	}
-
 	if (test_bit(__I40E_DOWN, pf->state) ||
 	    test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
 		return -EADDRNOTAVAIL;