Update DTS bindings for known edge platforms

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2121508
Tested: This is one of a series of patch sets to enable Arm SystemReady IR
 support in the kernel for NXP i.MX8 platforms.  This set updates the
 DTS sources and dt-bindings directories.  While the DTS sources are
 primarily documentation, the dt-bindings are used in compiling the
 kernel.  This set has been tested via simple boot tests and the CI
 loop.

This is one of a series of patch sets to enable Arm SystemReady IR support in the kernel for NXP i.MX8 and some additional Edge platforms.  This set updates the DTS sources and dt-bindings directories.  All of the changes to the DTS files are primarily meant to keep documentation up to date; in the wild, the SoC/SoM vendor will provide the official DTB (and hence the official DTS) via UEFI.  Keeping the DTS in fairly close sync with the vendor's DTB enables platform users to better understand what hardware the platform contains.  Keeping the dt-bindings up to date in some cases allows for kernel and kernel module compilation to work properly since there are some drivers that depend on the proper content in include/dt-bindings.

Some of the fixes at the end of this series are from linux-next; everything else is from Linus' tree.

Signed-off-by: Al Stone <ahs3@redhat.com>