[hikey960] Fix GPIO support ZX-2668 #done TEST: Zircon fully boots on Hikey, is able to zedboot itself. Change-Id: I410edaa1bc3ea483a90af0f5ca4797af0f407fb7
[dev] Rename system/dev/soc to system/dev/lib Change-Id: I9ebed28956566cc71bdfe142bff633ef50f8a9dc