Use /boot/loader/entries as BLS dir also on EFI systems
    
    For EFI systems, the BLS fragments were stored in the EFI System Partition
    (ESP) while in non-EFI systems it was stored in /boot.
    
    For consistency, it's better to always store the BLS fragments in the same
    path regardless of the firmware interface used.
    
    Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>