Reviewed-on: https://codeberg.org/libreboot/lbmk/pulls/13

i downloaded this file from git manually at some point,
when rebasing changes (i think it was the ec ones)

the logic in the file is correct but i forgot to mark
it executable

without this commit, lbmk fails utterly, on all the newer
intel boards

This reverts commit fe2b72035fb58d2c0792daa62aa346da710f04a3.

The GRUB patch to fix the E6400 broke other systems and has been
reverted. As a result, GRUB needs to be disabled again on the E6400
until a better fix has been created.