Merge branch 'thunderx_octeon_mdio'

Radha Mohan Chintakuntla says:

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Add MDIO support to ThunderX NIC driver

This patch series adds MDIO support to ThunderX NIC driver by making use
of existing mdio-octeon driver. In the process modified the mdio-octeon
driver to work on both Octeon and ThunderX platforms.

* From v1:
  - Removed default selection in Kconfig for MDIO_OCTEON
  - Replace uint64 with u64 as suggested by David Daney
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Signed-off-by: David S. Miller <davem@davemloft.net>