ARM: SoC fixes for v5.16, part 2

There are only a few devicetree fixes this time:

 - one outdated devicetree property that slipped into the
   newly added ExynosAutov9 support

 - three changes to Broadcom SoCs that had incorrect
   number values for interrupts or irqchips.

In the MAINTAINERS file, Nishanth Menon gets listed for TI K3 SoCs,
while Taichi Sugaya and Takao Orito take ownership of the Socionext
Milbeaut platform.

All other changes are for SoC specific drivers, fixing:

 - A missing NULL pointer check in the mediatek memory driver

 - An integer overflow issue in the Arm smccc firwmare interface

 - A false-positive fortify-source check

 - Error handling fixes for optee and smci

 - Incorrect message format in one SCMI call