ice: Demote MTU change print to debug

Following the changes of commit 12299132 ("net: ethernet: intel: Demote
MTU change prints to debug"), change the MTU change message to netdev_dbg()
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ice/ice_main.c

@@ -4836,7 +4836,7 @@ static int ice_change_mtu(struct net_device *netdev, int new_mtu)
 		}
 	}
 
-	netdev_info(netdev, "changed MTU to %d\n", new_mtu);
+	netdev_dbg(netdev, "changed MTU to %d\n", new_mtu);
 	return 0;
 }