Merge tag 'arm-soc/for-5.12/devicetree' of https://github.com/Broadcom/stblinux into...

This pull request contains Broadcom ARM-based SoCs Device Tree changes
for 5.12, please pull the following:

- Dave adds a proper compatile string for the DSI1 panel on 2711
  (Raspberry Pi 4) to permit adequate driver differentiation

- Nicolas declares reserved memory regions filed by the Rasbperry Pi
  bootloader to indicate the running system configuration

- Maxime declares the BSC (HDMI I2C controller) and CEC interrupt
  controllers

- Stanislav fixes a tab vs. space issue in the BCM21664 DTS

* tag 'arm-soc/for-5.12/devicetree' of https://github.com/Broadcom/stblinux:
  ARM: dts: bcm2711: Add the CEC interrupt controller
  ARM: dts: bcm21664: Replace spaces with a tab
  ARM: dts: bcm2711: Add the BSC interrupt controller
  ARM: dts: bcm2711: Add reserved memory template to hold firmware configuration
  ARM: dts: bcm2711: Use compatible string for BCM2711 DSI1

Link: https://lore.kernel.org/r/20210131221721.685974-3-f.fainelli@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>