At this point, all mga kernels have the CONFIG_EFI_STUB option undefined.
Enabling this option would let UEFI-based machines boot directly from a boot manager (rEFIt, rEFInd, or built-in boot manager) without an extra bootloader.
See description here:
This would be all the more helpful that GRUB legacy does not support EFI, and Grub2 integration is still being worked on (see Bug 416).
Fixed in SVN for Mageia 2 and Cauldron