Mellanox: Add new mlxsw_spectrum firmware xx.2000.2714

Add new firmware files for Spectrum-1 (13.2000.2714) and Spectrum-2
(29.2000.2714). The new firmware contains:
* Support for querying the PCI reset timeout for gearbox based systems
* Support for 2x50 Gb/s port split option on SN3800 systems

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -4634,9 +4634,11 @@ File: mellanox/mlxsw_spectrum-13.2000.1122.mfa2
 File: mellanox/mlxsw_spectrum-13.2000.1886.mfa2
 File: mellanox/mlxsw_spectrum-13.2000.2308.mfa2
 File: mellanox/mlxsw_spectrum2-29.2000.2308.mfa2
+File: mellanox/mlxsw_spectrum-13.2000.2714.mfa2
+File: mellanox/mlxsw_spectrum2-29.2000.2714.mfa2
 
 Licence:
- Copyright (c) 2017-2019 Mellanox Technologies, Ltd. All rights reserved.
+ Copyright (c) 2017-2020 Mellanox Technologies, Ltd. All rights reserved.
 
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met: