Merge branch 'bnxt_en-Add-support-for-new-57500-chips'

Michael Chan says:

====================
bnxt_en: Add support for new 57500 chips.

This patch-set is larger than normal because I wanted a complete series
to add basic support for the new 57500 chips.  The new chips have the
following main differences compared to legacy chips:

1. Requires the PF driver to allocate DMA context memory as a backing
store.
2. New NQ (notification queue) for interrupt events.
3. One or more CP rings can be associated with an NQ.
4. 64-bit doorbells.

Most other structures and firmware APIs are compatible with legacy
devices with some exceptions.  For example, ring groups are no longer
used and RSS table format has changed.

The patch-set includes the usual firmware spec. update, some refactoring
and restructuring, and adding the new code to add basic support for the
new class of devices.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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