The defconfigs should not be edited directly. They should be generated
by editing the .config (through menuconfig or whatever) and then run
make savedefconfig to have the Kconfig system generate a clean defconfig

I did this for sandbox here with no actual changes.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>