This reverts commit 4f13f72dbc ("libpayload: Define UCHAR_MAX/CHAR_MIN/CHAR_MAX").
Reason for revert: char can be either signed or unsigned. If it's
unsigned, then CHAR_MIN would be incorrectly defined as 128.
Change-Id: Id49ddfff2d91029dc191b8b64e8e3f325ad0a462
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/89469
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>