ARM/SoC: drivers for v5.7

These are updates to SoC specific drivers that did not have
another subsystem maintainer tree to go through for some
reason:

- Some bus and memory drivers for the MIPS P5600 based
  Baikal-T1 SoC that is getting added through the MIPS tree.

- There are new soc_device identification drivers for TI K3,
  Qualcomm MSM8939

- New reset controller drivers for NXP i.MX8MP, Renesas
  RZ/G1H, and Hisilicon hi6220

- The SCMI firmware interface can now work across ARM SMC/HVC
  as a transport.

- Mediatek platforms now use a new driver for their "MMSYS"
  hardware block that controls clocks and some other aspects
  in behalf of the media and gpu drivers.

- Some Tegra processors have improved power management
  support, including getting woken up by the PMIC and cluster
  power down during idle.

- A new v4l staging driver for Tegra is added.

- Cleanups and minor bugfixes for TI, NXP, Hisilicon,
  Mediatek, and Tegra.

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