ARM: SoC fixes for v5.8

Here are a couple of bug fixes, mostly for devicetree files

NXP i.MX:
  - Use correct voltage on some i.MX8M board device trees to
    avoid hardware damage
  - Code fixes for a compiler warning and incorrect reference
    counting, both harmless.
  - Fix the i.MX8M SoC driver to correctly identify imx8mp
  - Fix watchdog configuration in imx6ul-kontron device tree.

Broadcom:
  - A small regression fix for the Raspberry-Pi firmware driver
  - A Kconfig change to use the correct timer driver on Northstar
  - A DT fix for the Luxul XWC-2000 machine
  - Two more DT fixes for NSP SoCs

STmicroelectronics STI
  - Revert one broken patch for L2 cache configuration

ARM Versatile Express:
  - Fix a regression by reverting a broken DT cleanup

TEE drivers:
  - MAINTAINERS: change tee mailing list

Signed-off-by: Arnd Bergmann <arnd@arndb.de>