Merge branch 'stmmac-cleanups'

Corentin Labbe says:

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net: stmmac: misc fix

I am currently working on dwmac-sun8i glue driver for Allwinner H3/A83T/A64.
This series is the result of all minor problem found in the stmmac driver.

All patch are tested on cubieboard2 via dwmac-sunxi and on pine64/orangepis via dwmac-sun8i.

Changes since v1:
- Removed netdev_dbg() in "net: stmmac: print phy information"
- Removed patch "net: stmmac: Implement NAPI for TX", it will be reworked
- Changed error message in "Correct the error message about invalid speed"
- Added some acked-by
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Signed-off-by: David S. Miller <davem@davemloft.net>