Bug#824954: flash-kernel: GRUB? via U-Boot?

[Elliott Mitchell <ehem+undef@m5p.com>]

There may be several distinct bugs involved with #824954.  For one, I
suspect `grub-install`'s behavior needs to change if EFI variables aren't
supported.  I use this as a flag which could distinguish installation on
top of a full EFI implementation (perhaps Tianocore-derived), versus
U-Boot's rather primative EFI implementation.

Notably right now `grub-install` tries to install to
/boot/efi/EFI/debian by default.  This is appropriate for a full EFI
implementation where boot entries can be added by adding variables.  Yet
with U-Boot's limited implementation, the files must go in EFI/BOOT
(--bootloader-id=BOOT).

Right now I'm simply trying to figure out what others have done to reuse
it for my own purposes.


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