The UP2 EFI firmware is a bit capricious and does not consistantly keep the
boot order after adding one using `efibootmgr`. There is no magic recipe (or
known reliable sequence) and hence we add a note warning the user that this
can happen, and when it does the only solution is to try modifying some more
the list of boot entries (inc. re-ordering them).
Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
