Mellanox: Add new mlxsw_spectrum firmware xx.2014.4012

Add latest verified version of Nvidia Spectrum-family switch firmware,
for Spectrum (13.2014.4012), Spectrum-2 (29.2014.4012), Spectrum-3
(30.2014.4012) and Spectrum-4 (34.2014.4012).

Besides many changes and fixes, this version adds support for SN5400
systems.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -6716,6 +6716,10 @@ File: mellanox/mlxsw_spectrum-13.2012.1012.mfa2
 File: mellanox/mlxsw_spectrum2-29.2012.1012.mfa2
 File: mellanox/mlxsw_spectrum3-30.2012.1012.mfa2
 File: mellanox/mlxsw_spectrum4-34.2012.1012.mfa2
+File: mellanox/mlxsw_spectrum-13.2014.4012.mfa2
+File: mellanox/mlxsw_spectrum2-29.2014.4012.mfa2
+File: mellanox/mlxsw_spectrum3-30.2014.4012.mfa2
+File: mellanox/mlxsw_spectrum4-34.2014.4012.mfa2
 
 Licence:
  Copyright (c) 2017-2020 Mellanox Technologies, Ltd. All rights reserved.