tree 32dd275494f021a9ea3b8f9ddcc1ed5855b6c900
parent fe6cdf34977dde92c4dc939a9ced44c7f12a4117
author Frank Wunderlich <frank-w@public-files.de> 1561800979 +0200
committer Tom Rini <trini@konsulko.com> 1563463885 -0400

env: register erase command

this patch adds basic changes for adding a erase-subcommand to env

with this command the environment stored on non-volatile storage written
by saveenv can be cleared.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>

squashed fixes
 - start message with "Erasing"
 - mark erase-function as optional
 - env: separate eraseenv from saveenv

Suggested-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>