Merge tag 'arm-soc/for-5.5/devicetree' of https://github.com/Broadcom/stblinux into arm/dt

This pull request contains Broadcom ARM-based SoCs Device Tree updates
for 5.5, please pull the following:

- Stefan paves the way for supporting the Raspberry Pi 4 and gets rid of
  a bunch of dtc checker warnings by removing incorrect
  nodes/properties, moving BCM2835/6/7 specific nodes into the
  appropriate DTS, converts Raspberry Pi boards to JSON schema, and
  finally adds minimal Raspberry Pi 4 model B support

- Dan adds support for the Luxul XWC-2000 router based on the BCM47094 SoC

- Chris adds a proper label to the Hurricane 2 watchdog controller node

* tag 'arm-soc/for-5.5/devicetree' of https://github.com/Broadcom/stblinux:
  ARM: dts: bcm: HR2: add label to sp805 watchdog
  ARM: dts: BCM5301X: Add DT for Luxul XWC-2000
  arm64: dts: broadcom: Add reference to RPi 4 B
  ARM: dts: Add minimal Raspberry Pi 4 support
  dt-bindings: arm: bcm2835: Add Raspberry Pi 4 to DT schema
  dt-bindings: arm: Convert BCM2835 board/soc bindings to json-schema
  ARM: dts: bcm283x: Move BCM2835/6/7 specific to bcm2835-common.dtsi
  ARM: dts: bcm283x: Remove brcm,bcm2835-pl011 compatible
  ARM: dts: bcm283x: Remove simple-bus from fixed clocks

Link: https://lore.kernel.org/r/20191023212814.30622-1-f.fainelli@gmail.com


Signed-off-by: Olof Johansson <olof@lixom.net>