Add latest verified version of Nvidia Spectrum-family switch firmware,
for Spectrum (13.2010.3146), Spectrum-2 (29.2010.3146) and Spectrum-3
(30.2010.3146). Furthermore, add lc_ini_bundle_2010_3146.bin for modular
systems.

The following issues have been fixed:

- In Spectrum-3, fix fallback from PCIe gen3 to gen1, resulting in poor PCI
  throughput
- In Spectrum-2, 1Gbps speed is now supported with 40Gbps modules
- Stability issues when burning FW to gearboxes on modular systems
- Several issues in link negotiation and link stability of modular systems
- Latency of several registers has been improved: PLLP, SFMR, SFN, PEFA,
  RATR, MPILM, PPBS, RMPE, RIPS, PTER, SBCTR
- In Spectrum-2 and Spectrum-3, an issue in ECN marking on traffic going
  through split ports
- Support of IPv4-to-IPv6 NAT in Spectrum-4
- PTP accuracy improvements on 1Gbps, 25Gbps and 50Gbps ports in Spectrum-1
  and 10Gbps port in Spectrum-3
- On Spectrum-2+, fix edge cases of ACL matching IPv6 packets
- On Spectrum-3, an issue with a partial CRC overwrite when timestamp over
  CRC is set to UTC and CRC recalculation is disabled
- On Spectrum-1, a possible FW freeze when many (e.g. 70) ports are up, and
  shared buffer configuration is applied on the fly
- On Spectrum-3, an issue with port-down reason still being reported
  despite link having been established

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