ARM: SoC drivers for 6.9

This is the usual mix of updates for drivers that are used on (mostly
ARM) SoCs with no other top-level subsystem tree, including:

 - The SCMI firmware subsystem gains support for version 3.2 of the
   specification and updates to the notification code.

 - Feature updates for Tegra and Qualcomm platforms for added
   hardware support.

 - A number of platforms get soc_device additions for identifying newly
   added chips from Renesas, Qualcomm, Mediatek and Google.

 - Trivial improvements for firmware and memory drivers amongst
   others, in particular 'const' annotations throughout multiple
   subsystems.
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