Bug#1146562: Please return efi_uga.mod to x86_64-efi grub

[Mikhail Ryazanov]

As Mate Kukri requested in a personal email, I've reported the 
text-cursor and videotest bugs upstream:
https://gitlab.freedesktop.org/gnu-grub/grub/-/work_items/83
https://gitlab.freedesktop.org/gnu-grub/grub/-/work_items/84