qemu: cgroup: Setup cgroups for bios/firmware images
qemu: cgroup: Setup cgroups for bios/firmware images

oVirt wants to use OVMF images on top of lvm for their 'logical'
storage thus we should set up device ACLs for them so it will actually
work.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1305922

andreabolognani/libvirt,libvirt/libvirt,olafhering/libvirt,jardasgit/libvirt,jfehlig/libvirt,olafhering/libvirt,datto/libvirt,taget/libvirt,taget/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,olafhering/libvirt,zippy2/libvirt,datto/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,libvirt/libvirt,nertpinx/libvirt,eskultety/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,eskultety/libvirt,eskultety/libvirt,jardasgit/libvirt,datto/libvirt,jfehlig/libvirt,crobinso/libvirt,jardasgit/libvirt,eskultety/libvirt,VenkatDatta/libvirt,olafhering/libvirt,andreabolognani/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,zippy2/libvirt,jfehlig/libvirt,jfehlig/libvirt,zippy2/libvirt,libvirt/libvirt,fabianfreyer/libvirt,zippy2/libvirt,andreabolognani/libvirt,nertpinx/libvirt,taget/libvirt,datto/libvirt,nertpinx/libvirt,datto/libvirt,crobinso/libvirt,libvirt/libvirt,nertpinx/libvirt,eskultety/libvirt,taget/libvirt,crobinso/libvirt,VenkatDatta/libvirt,taget/libvirt,crobinso/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt