Mellanox: Add new mlxsw_spectrum firmware 13.2000.1886

The new firmware contains:
* Support for extended error reporting via a new TLV in the EMAD packet.
Similar to netlink extended ack.
* Fix for an issue in the PCI code that can result in false AER errors
under high Tx rate.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -4433,6 +4433,7 @@ File: mellanox/mlxsw_spectrum-13.1702.6.mfa2
 File: mellanox/mlxsw_spectrum-13.1703.4.mfa2
 File: mellanox/mlxsw_spectrum-13.1910.622.mfa2
 File: mellanox/mlxsw_spectrum-13.2000.1122.mfa2
+File: mellanox/mlxsw_spectrum-13.2000.1886.mfa2
 
 Licence:
  Copyright (c) 2017-2019 Mellanox Technologies, Ltd. All rights reserved.