Merge branch 'sh_eth-reg-defs'

Sergey Shtylyov says:

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sh_eth: Improve the register/bit definitions in the Ether driver

Here are 4 patches against DaveM's 'net-next' repo. Mainly I'm renaming the register *enum*
tags/entries to match the SoC manuals,and also moving the RX-TX descriptor *enum*s closer to
the corresponding *struct*s...
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Signed-off-by: David S. Miller <davem@davemloft.net>