Merge tag 'efi-2025-04-rc5' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2025-04-rc5

CI:

* https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/25196

UEFI:

* Export _start symbol from crt0_*_efi stubs
* Move .dynamic out of .text in EFI
* scripts/Makefile.lib: Preserve the .dynstr section as well

Documentation:

* net: miiphybb: Convert documentation to rst