Commits
Heinrich Schuchardt committed 3545c661434
efi_loader: SetVariable() deleting variables
APPEND_WRITE with data length zero is allowable according to the UEFI
specification.
The EDK2 interpretation of no access attributes is attributes = 0. As
the UEFI specification is vague in this respect let's stick to EDK2 here.
Fixes: commit 6d2f27c5fd60 ("efi_loader: variable: support APPEND_WRITE")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>