Merge tag 'arm-soc/for-4.12/devicetree-arm64' of http://github.com/Broadcom/stblinux into next/dt64

Pull "Broadcom devicetree-arm64 changes for 4.12" from Florian Fainelli:

This pull request contains Broadcom ARM64-based SoCs Device Tree updates for
4.12, please pull the following:

- Rob enables the cryptographic block on Northstar 2 (SPU) by adding the proper
  Device Tree nodes

- Jon replaces all occurences of: status = "ok" with status = "okay" to better
  conform to the Device Tree specification

* tag 'arm-soc/for-4.12/devicetree-arm64' of http://github.com/Broadcom/stblinux:
  arm64: dts: NS2: convert "ok" to "okay"
  arm64: dts: NS2: Add Broadcom SPU driver DT entry