Merge branch 'sfc-Medford2'

Edward Cree says:

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sfc: Initial X2000-series (Medford2) support

Basic PCI-level changes to support X2000-series NICs.
Also fix unexpected-PTP-event log messages, since the timestamp format has
 been changed in these NICs and that causes us to fail to probe PTP (but we
 still get the PPS events).
====================

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