Merge tag 'xilinx-for-v2026.10-rc1-v3' of https://git.u-boot-project.org/u-boot/custo...

AMD/Xilinx/FPGA changes for v2026.10-rc1 v3

AMD:
- Firmware interface decoupling (part 1)

ZynqMP:
- DT updates
- Add TCG variant detection

Versal/Versal2:
- Drop DDR MMU mapping and map it dynamically

tools:
- Add register initialization to mkimage

MAINTAINERS:
- Clean Zynq/ZynqMP fragments

ufs:
- Fix driver reregistration

fpga:
- altera: Simplify driver conditional compilation selection