Please delete grub2-efi http://aur.archlinux.org/packages.php?ID=40300 package . I am currently working on a grub2 split pkg for extra repo and grub2-efi-bzr http://aur.archlinux.org/packages.php?ID=40290 package provides the same functionality as grub2-efi as of now. I am the maintainer of both the pkgs.
Regards. Keshav
