default environment append from kconfig

[Francesco Dolcini]

Hello all,
is there any kconfig mechanism in u-boot to append environment variable to the
default one?

I am aware of CONFIG_USE_DEFAULT_ENV_FILE, but this will completely
replace it, looking into the code I was not able to find anything, but I
wonder if something from this
https://lore.kernel.org/all/20211022030852.1986718-1-sjg@chromium.org/
can be used.

Francesco