Change in coreboot[master]: mainboard/winnet/g170: Add WinNET G170 board

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Change subject: mainboard/winnet/g170: Add WinNET G170 board
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Patch Set 6:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/14719/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59410/ : SUCCESS