Merge tag 'arm-soc/for-5.4/devicetree' of https://github.com/Broadcom/stblinux into arm/dt

This pull request contains Broadcom ARM-based SoCs Device Tree updates
for 5.4, please pull the following:

- Stefan does a bunch of preparatory work for supporting the Raspberry
  Pi 4in the next merge window correct register ranges (SPI, I2C,
  UART), define memory, HDMI and MMC properties at the board level

* tag 'arm-soc/for-5.4/devicetree' of https://github.com/Broadcom/stblinux:
  ARM: dts: bcm283x: Enable HDMI at board level
  ARM: dts: bcm283x: Define memory at board level
  ARM: dts: bcm283x: Define MMC interfaces at board level
  ARM: bcm283x: Reduce register ranges for UART, SPI and I2C