ARM: devicetree updates for 6.1

Most of the changes fall into one of three categories: adding support
for additional devices on existing machines, cleaning up issues found
by the ongoing conversion to machine-readable bindings, and addressing
minor mistakes in the existing DT data.

Across SoC vendors, Qualcomm and Freescale stick out as getting the most
updates, which corresponds to their dominance in the mobile phone and
embedded industrial markets, respectively.

There are 636 non-merge changeset in this branch, which is a little
lower than most times, but more importantly we only add 36 machine
files, which is about half of what we had the past few releases.

Eight new SoCs are added, but all of them are variations of already
supported SoC families, and most of them come with one reference board
design from the SoC vendor:

 - Mediatek MT8186 is a Chromebook/Tablet type SoC, similar to the
   MT65xx series of phone SoCs, with two Cortex-A76 and six Cortex-A55
   cores.

 - TI AM62A is another member of the K3 family with Cortex-A53 cores,
   this one is targetted at Video/Vision processing for industrial
   and automotive applications.

 - NXP i.MX8DXL is another chip for this market in the ever-growing
   i.MX8 family, this one again with two Cortex-A35 cores.

 - Renesas R-Car H3Ne-1.7G (R8A779MB) and R-Car V3H2 (R8A77980A) are
   minor updates of R8A77951 and R8A77980, respectively.

 - Qualcomm IPQ8064-v2.0, IPQ8062 and IPQ8065 are all variants of the
   IPQ8064 chip, with minimally different features.

The AMD Pensando Elba and Apple M1 Ultra SoC support was getting close
this time, but in the end did not make the cut.

The new machines based on existing SoC support are fairly uneventful:

 - Sony Xperia 1 IV is a fairly recent phone based on Qualcomm
   Snapdragon 8 Gen 1.

 - Three Samsung phones based on Snapdragon 410: Galaxy E5, E7 and
   Grand Max. These are added for both 32-bit and 64-bit kernels,
   as they originally shipped running 32-bit code.

 - Two new servers using AST2600 BMCs: AMD DaytonaX and Ampere
   Mt. Mitchell

 - Three new machines based on Rockchips RK3399 and RK3566:
   Anberic RG353P and RG503, Pine64 Pinephone Pro, Open AI Lab

 - Multiple NXP i.MX6/i.MX8 based boards: Kontron SL/BL i.MX8MM OSM-S,
   i.MX8MM Gateworks GW7904, MSC SM2S-IMX8PLUS SoM and carrier board

 - Two development boards in the Microchip AT91 family:
   SAMA5D3-EDS and lan966x-pcb8290.

 - Minor variants of existing boards using Amlogic, Broadcom, Marvell,
   Rockchips, Freescale Layerscape and Socionext Uniphier SoCs.