We only have a single U-Boot version currently, so there is no value in
storing the patch file in a version specific directory. This makes sure
U-Boot 2021.10 final release also has fileenv support.
Unfortunately builds for 32-bit seem to lead to freezes. Conservatively
only update to 2020.07 for 64-bit builds.
Co-authored-by: Malcolm Lashley <mlashley@gmail.com>
Co-authored-by: Malcolm Lashley <mlashley@gmail.com>
