$ tree project-spec/meta-user/recipes-bsp/u-boot/
│ └── platform-top.h
│ ├── boot.cmd.default
│ └── boot.cmd.default.initrd
2 directories, 5 files
This is a known issue in the 2020.2 release version of PetaLinux and will be fixed in the 2021.1 release.
These files are never used when you build a PetaLinux MicroBlaze project, as U-boot distro boot is supported only for SoC platforms and is not supported for MicroBlaze in the 2020.x releases.
Additionally, the Yocto recipe has a machine compatible check for SoC platforms (see https://github.com/Xilinx/meta-xilinx/blob/rel-v2020.2/meta-xilinx-bsp/recipes-bsp/u-boot/u-boot-zynq-scr.bb#L11-L14 ), so you can safely ignore or remove these files as it does not break the functionality.