[U-Boot] Renaming files on an SD card

[D Kesselring]

(My apologies for the last message. I tried to send it from my phone.)
I should have been more specific. On first boot, I boot the os then rename a
uboot script so that it will run on reboot. Once the script runs now I need
to either delete or rename the script so that it does not rerun on the next
reset. I could boot into the OS and do the rename/delete there but I was hoping
to do it while still in u-boot.
Thanks, David