Merge branch '2023-08-03-mediatek-and-ten64-updates'

Merge branch '2023-08-03-mediatek-and-ten64-updates'

Merge in a series for MediaTek update and another for Ten64.

To quote Weijie Gao for MediaTek:
This patch series add support for MediaTek MT7988 SoC with its reference
boards and related drivers.

This patch series add basic boot support on eMMC/SD/SPI-NOR/SPI-NAND for
these boards. The clock, pinctrl drivers and the SoC initializaton code
are also included.

Product spec for MT7988:
https://www.mediatek.com/products/broadband-wifi/mediatek-filogic-880

And to quote Mathew McBride for Ten64:
This is a series of updates for the Ten64 board,
that are part of our firmware releases but not yet upstreamed
into U-Boot.

Changes of note include:

- Turning on standard boot support

  Standard boot improves the user experience over distroboot on Ten64,
  as we had various hacks in our firmware to solve some corner-case
  issues (e.g DTB handling) in distroboot, which are not needed with the
  bootflow system.

- Recognition of the new 'RevD' board variant distributed to OEM
  customers

- Fixing various boot issues related to FIT images and operating systems
  running out of the NAND (OpenWrt, recovery environment).

- A better 'opt-out' solution for fsl_setenv_bootcmd for Layerscape
  platforms booting from TF-A.

  This was discussed when the Ten64 was upstreamed into U-Boot. I think
  declaring fsl_setenv_bootcmd as __weak and allowing individual boards
  to override is the best way to do this without significant rework.
  (We actually depend on a similar feature for the DPAA2/MC firmware
  loading)

Compared to our firmware branch, there is still a few features missing (e.g USB
Hub, fan controller and fixes for the VSC8514). Some of these depend on other
things (like sorting out device tree schemas) so may not appear in mainline
U-Boot for a while yet.