Based on patch from Bean
(http://lists.gnu.org/archive/html/grub-devel/2009-08/msg00384.html)
* video/efi_fb.c: New file.
* conf/i386-efi.rmk (pkglib_MODULES): Add `efi_fb.mod'.
(efi_fb_mod_SOURCES, efi_fb_mod_CFLAGS, efi_fb_mod_LDFLAGS): New
variables.
* conf/x86_64-efi.rmk: Likewise.