Merge branch 'bgmac-stingray-soc'

Abhishek Shah says:

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Extend BGMAC driver for Stingray SoC

The patchset extends Broadcom BGMAC driver for Broadcom Stingray SoC.

This patchset is based on Linux-4.12 and tested on NS2 and Stingray.
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Signed-off-by: David S. Miller <davem@davemloft.net>