Merge tag 'xilinx-for-v2023.07-rc3' of https://source.denx.de/u-boot/custodians/u-boot-microblaze

Xilinx changes for v2023.07-rc3

.mailmap
- Fix Xilinx IDs

ZynqMP:
- Fix R5 split boot mode
- DT fixes - sync with Linux

Xilinx:
- Enable virtio and RNG support
- Enable ADI ethernet phy

SPI/Zynq:
- Fix dummy byte calculation