qemu: domain: Extract parsing and formatting of priv->autoNodeset
qemu: domain: Extract parsing and formatting of priv->autoNodeset

Move the code to separate functions to avoid complicating the existing
ones with changes.

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