Merge branch 'sfc-support-25G-configuration-with-ethtool'

Edward Cree says:

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sfc: support 25G configuration with ethtool

Adds support for advertise bits beyond the 32-bit legacy masks, and plumbs in
 translation of the new 25/50/100G bits to/from MCDI.
====================

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