libvirt.spec.in: remove conditional for driver modules
libvirt.spec.in: remove conditional for driver modules

Both RHEL and Fedora build with driver modules enabled by
default, so there is no need for any conditional.

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

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