Merge branch 'stmmac-next'

Jose Abreu says:

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net: stmmac: Improvements for -next

Misc patches for -next. It includes:
 - Two fixes for features in -next only
 - New features support for GMAC cores (which includes GMAC4 and GMAC5)
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Signed-off-by: David S. Miller <davem@davemloft.net>